Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff7edf0d2e42fac5…

MALICIOUS

PDF

95.0 KB Created: 2021-09-07 01:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a79cc9146b0d1b2b9b9800160f0234c2 SHA-1: 60df9e925c3ec4aa37f8a0f97cf53f5cb6f87227 SHA-256: ff7edf0d2e42fac5b62278e218a6069d0ef728c00590811ba63156d7be156994
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of these links suggests an attempt to direct users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://badaranquehablar.com/userfiles/files/todukesur.pdf In PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b99651b4e6---zanoxatovubizofex.pdfIn PDF document text
    • http://xn--oy2b9bv81anouola.com/upload/file/202107201651081564.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/nowepezasenotavo.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d56e66dcf3---ludusafumofomoletolod.pdfIn PDF document text
    • http://upsshop.ru/ckfinder/userfiles/files/letezerulatixafipezaxuke.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/89594516649.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad310309b61---99240032405.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/920619953.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/49994281442.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/42635550356.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/6c7b7a23be81aed965fd3ff13743d9a3/nebelobejo.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/pplomhc72vssha5on681f7pe05/88690427640.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/wusonanidebimetugufud.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ffc2c843f---nixolobe.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081d6596e900---9543756747.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/rgag5h561kq3hipjipetptvksc/dodozejujajaj.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/fa7eba7a9e7dbacc9441a4417e9268a8/saxeri.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160859b077dadd---jusizebolajaliloxiw.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/9421070200.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099267c5781c---18693456097.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/94678115565.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/8ro8bon0r2tgcign7rdgm6c1j8/xavas.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/801465e34fa44ab428c42e8e92ca85ac/95667116965.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=leer+el+cuervo+de+edgar+allan+poe+pdfPDF 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_off0001081d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12034 10560 bytes
SHA-256: 37ead4ecf1ed018e90d41f4174f97439fe1b1d475f2752f6b9deb2ea4284e6de
font_02_sfnt_off00013825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13825 20952 bytes
SHA-256: 0a9fa2b20afcb7adc69f970c88d3fce4b7e9a0068b0a0c941a4155457b401eb6

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