Malicious PDF — malware analysis report

Static analysis result for SHA-256 615777731b34f7bb…

MALICIOUS

PDF

85.9 KB Created: 2021-07-01 19:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 220584113009dd364bfd94a31828ad71 SHA-1: 92f041ce2cf81910275494ca0c1746df860a25a9 SHA-256: 615777731b34f7bb16152d44e254d1ee324516c5240c860f3af83f77e1c96a7d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised CMS upload storage, suggesting it's designed as a link farm to distribute malicious content or phish users. The presence of an IP address literal in one of the URIs further indicates a suspicious attempt to direct users to a potentially harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4985045fc---64149363742.pdf In PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/df71a0l9cigilpujm8hpnrrl2c/27805332505.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16086995f35435---78682571895.pdfIn PDF document text
    • http://thedreaminitiative.org/Content/Admin/uploads/files/mozofusesopedezovipupoko.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210605170703.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/31a789b87e39ea9ac11fab5da74c1680/76599854980.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/regujemorevito.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd8fe8a0a6---26489537496.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/b6c63770d06aeaeaf40fb8cfe6336e62/30049366914.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/levidolugukerojatuwo.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/09744af05eff90da842b1d00e76d17b8/pafewetezoxusuguzeko.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b2368fa291c---bugakudefaz.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3783363100---22824442628.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/h8hu3a4o4qaddjg419pibnoe22/62932701346.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/morigepogukokukobasame.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/f8ffaae7615e5d418bfc0be045016686/vuvepikup.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/7bf662ebd7b1eb6a99168f2478f2570f/tujekufareko.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16096477399ecb---16003748090.pdfPDF link annotation
    • https://afayl.com/userfiles/file/44334625287.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca752cc4f6---44741687210.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/4e58291aab15a508ddd88a6e896f047c/13294706476.pdfIn PDF document text
    • http://laconchigliacasevacanze.it/userfiles/files/gigabokidopat.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/danonud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=hopelessly+devoted+to+you+vol+4PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD477 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC89 17636 bytes
SHA-256: a0d626bbc51b4c5c4ec2baf26405604e2c04d6c2fa2cdcc90f5dcc291f986eb5
font_02_sfnt_off00011af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF2 16228 bytes
SHA-256: 11c5a07d087146020572b41e3c25cf6f3fd7b709257038c787216a38c3b0495f
font_03_sfnt_off000130da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130DA 10276 bytes
SHA-256: 3b6be873390e09f549ccaaf37346755ff63e006c7cffaa6bc9e2c478e03eaf2b

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