Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeafb29ef748948a…

MALICIOUS

PDF

81.2 KB Created: 2021-09-01 15:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9b6985e2a6d6db8a5168845d638b2be7 SHA-1: acfcb8c614716307184b95a731ce6edc5bc1a2bc SHA-256: eeafb29ef748948a808166fbf87cc64aa039c35524598257a4f033214f560cd1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, characteristic of a link farm used to distribute phishing content or malware. The presence of these links suggests the primary function is to redirect users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://natatourism.com/userfiles/files/3511110292.pdf In PDF document text
    • http://be-now.pl/userfiles/file/nirunigawufon.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/50536344703.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b926b5dab---7438542320.pdfIn PDF document text
    • http://hsiwww.com/image/files/20210714_135042.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/i58goacaddg4olefnb4523fojr/72345651617.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6180d44ad---76350880894.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cd8693634a3---pelotiropetasuvaserob.pdfIn PDF document text
    • http://specimport.by/files/files/56078743578.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/65090077229.pdfIn PDF document text
    • https://bem-sa.com/img/file/71709837226.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/47393379438.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d20b6a848f8---solidokofijase.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/94162855323.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/77525416612.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/ef1d9ebe2ff06eca3c9be01b5cd3aad0/soginixisid.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/86024177347.pdfIn PDF document text
    • http://thuonghieutoancau.vn/uploads/files/11901502788.pdfIn PDF document text
    • http://yuha.be/_files/file/gutuledaxofiribedewibixal.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96fe410dbf.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/fac02fe714f519c2786e646156f0ba7c/51956125819.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/bamuletakedizizefekoliz.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/f74c63b23d107716701781f4b14f6a71/tinan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=the+compound+having+both+sp+and+sp2+hybridised+carbon+atom+isPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B1 11420 bytes
SHA-256: c30d46b4aef23cec8e5ee64614d81b785d49a52d6dc67160e77edeee354863e4
font_01_sfnt_off0000ed1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001052d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052D 18680 bytes
SHA-256: fac235e0473869e2674405b94b9c811de85075a5730780e15ba48362803b5092

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