Malicious PDF — malware analysis report

Static analysis result for SHA-256 177e6db831b00d25…

MALICIOUS

PDF

85.0 KB Created: 2021-07-29 22:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: b2137ff31249bf640d2ddb4dd1ba664c SHA-1: 12a53deae24679bf9c03e48f27bbea8bd5559bd2 SHA-256: 177e6db831b00d255f14a3f49ff863235148462c722a23455930eadb52bd75b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to redirect users to malicious payloads or phishing pages. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to lure users to external, untrusted content.

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://huntic.ru/uplcv?utm_term=que+es+interpretar+los+datos PDF link annotation
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe9c8b81af---pebefoboxokebodisarewoku.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/13439209471.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f175eb7117---fabadotil.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/dichelede65o3fpdif5faa6as0/wemivatowodoxomi.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/66tcevop3q7clhrj7h4u2k9os3/xurexe.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761f0204db0---18888894982.pdfIn PDF document text
    • https://mbbs.hr/files/1225042983.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caa5cf9c1bf---poxetijalagufu.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/40550614264.pdfIn PDF document text
    • http://japan-railpass.info/images/blog//file/75098744339.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/10788542657.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608554c763679---nosulosaguledojeror.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/85627907445.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/85727228962.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/90739222039.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/silajanagag.pdfIn PDF document text
    • http://aven.su/userfiles/file/kilididadojojuzurokonew.pdfIn PDF document text
    • http://isvpro.com/custom/files/ledepovawemokofaxe.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a62209834---betezalidagasiwuxexuxatil.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/62099156571.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa965b6fc8---pepadori.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16071f9ef46fe4---94319207609.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/60468169683.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_off0000e81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81C 17440 bytes
SHA-256: 5c00b5c9055f331244fa06ddbbd2e5f7563e1d50cbf85d55a63d9643f6cab977
font_01_sfnt_off000114b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B9 10544 bytes
SHA-256: f81c1397861f14ba2178ce2301b487459ab89729fb05d307508ca7f365d50ed9
font_02_sfnt_off00012cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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