Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad74f20edf4d0c33…

MALICIOUS

PDF

84.3 KB Created: 2021-09-05 22:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e9d43fd90ab0e3ddb54c353cbeeb62ba SHA-1: 0db5486b961a2cb37323d66328bffa87d8c7a2da SHA-256: ad74f20edf4d0c33b8b4f0a0869f391fad33ab779db3ff49c1e49b9df0cf8198
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. The presence of multiple external URIs and link farm heuristics supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://infrive.ru/uplcv?utm_term=how+to+merge+two+pdf+in+foxit+reader PDF link annotation
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2133208b1---9337645728.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210829191809_jauo4d.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/4gc5pmrndtjeaoj3eb300rni7j/norugukorexugulubozukef.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e35a2fb5861---95699813665.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/a9de7bbe8a73eafba06dfa1f04b52ecb/jatobixazexegopuxirora.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/419c5d6c4fbbd5ef5bfb2d2661fc75b2/98048576355.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afddebbfc9f---20265199130.pdfIn PDF document text
    • http://hanifeugur.com/image/files/fuxumoresevutiwepokobo.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/1dmstr6au7580tlcmkaqm48fkl/kabasuraz.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/189070697b77d30fe48d8bbbf913b2a8/66815689945.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/tudora.pdfIn PDF document text
    • http://woodlander.sk/grafika/file/79041738376.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/480a1f663f8a3ef7e37b43fad47eeeab/78641701668.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/natozidexevuwita.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/19287360181.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///94078736964.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160a65552da4b4---pewagira.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/80243585307.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/e524fefe7c18b0da21e071512cbef4e7/29474555015.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/povigagalaja.pdfIn PDF document text
    • http://hadt.vn/upload/files/kutupogedatifuvuneseti.pdfIn PDF document text
    • http://emekyesiltepe.net/images_upload/files/mamepekapa.pdfIn PDF document text
    • http://siciny.pl/userfiles/file/19005744768.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FC 10804 bytes
SHA-256: 0157ba16987dafa9d42a000b8b980456fa1cfb7b23f1b4db90ec9fedc4caef42
font_01_sfnt_off0000faad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BF 18636 bytes
SHA-256: ae6d4af0cfa7091a6eb17307ca9951e5b363a9f61c4236d938e902a4a99caf90

Open this report in the interactive analyzer, or submit your own file for analysis.