Malicious PDF — malware analysis report

Static analysis result for SHA-256 196714f204a0ba89…

MALICIOUS

PDF

104.6 KB Created: 2021-06-29 20:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 8edc42918b68a0c21b7ff6d5cb0b32f8 SHA-1: c18711a93b0d45b2ab0e02cbef8a731596d3f1d1 SHA-256: 196714f204a0ba89bf5fbe61ca6af0e087b746aefcb954ec03afc108ffda8052
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The file contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The presence of these links and the overall structure strongly indicate an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9747

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 http://sb-78.ru/files/file/9475180923.pdf In PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088902da8a0a---vanunobijorijezutado.pdfIn PDF document text
    • https://sy-tech.eu/file/59813477264.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa667c4ac8---tuwosi.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607486cf461b1---98004210138.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090ea21553ab---80817698710.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/44743973768.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec433f29b1---47883640855.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7abfd1506a---73405903986.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/1b71af9f79acf4d8f7381f97595aa4f6/25020654991.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/53776336982.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/bibolosabefeb.pdfIn PDF document text
    • http://xn--kprq5pvqklteonubj6c.tw/CKEdit/upload/files/dexonuwitexaw.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/mivaxazid.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/zazezamilegulofukafa.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/bee2962c256d6097f213d781edc17f11/foranurukilawovafodemas.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d341e57656---8949107774.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__60D3F9AE365B3.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/pejamadajatelorediseko.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/fafabotawaz.pdfIn PDF document text
    • https://ckmandarin.com/uploads/vusidogotixaluxepasewufit.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/e27e2511d07c7e1899866cebf86b1680/bakepaxidonumodotas.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/54471469851.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/4184ed8fff2b94a0e2b29624f0738345/93927692090.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/navotubafor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=char+char+meaningPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10933 4332 bytes
SHA-256: 4228a1ca385d954533679fcbc7278928bfde20aec0fd5ea4529576a410697a7a
font_02_sfnt_off00011967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11967 25240 bytes
SHA-256: 89a510cc10257fd354f7d7f02cd6bd3790600ee8d8410ccf076996fb62639a3c
font_03_sfnt_off000158d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158D7 10276 bytes
SHA-256: 6f17bb5e9a1a60eb47a7d269452e02438353f576ec523e93793d5960195465dc
font_04_sfnt_off00016fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FBC 21188 bytes
SHA-256: c2a377f54a23b4e568eeacc532fd16c4dbdfad72476dc2083f4fe47f592fc07f

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