Malicious PDF — malware analysis report

Static analysis result for SHA-256 347ca13c15736291…

MALICIOUS

PDF

85.4 KB Created: 2021-03-20 15:32:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 055b7cb099e6bc76509235582156a195 SHA-1: d8be267f06acba881b90658340152ff1a3afdb48 SHA-256: 347ca13c157362910d12454c790ec4870a19e025840ffcd9341691e9ac519e00
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wix?keyword=msa+manual+3rd+edition PDF link annotation
    • http://copyrightreports.com/warhammer_fantasy_books_chronologyy73a6.pdfIn PDF document text
    • http://nuzopofe.iblogger.org/physiology_by_ak_jain.pdfIn PDF document text
    • http://banquepopulaire-fr.org/rifakuruxenugepusuxiq92wd.pdfIn PDF document text
    • http://proita.fun/29021068821zt9eu.pdfIn PDF document text
    • http://mynasert.online/the_way_of_the_shaman_book_6aj9hf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469370/normal_5fd7874c9652d.pdfIn PDF document text
    • http://usejus.club/project_manager_remote_jobs_india7qwlu.pdfIn PDF document text
    • http://orbitan.fun/scarf_knitting_patternsp2he1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480170/normal_6011ad0f4fc96.pdfIn PDF document text
    • http://yandex-delivery.cc/dilamaqok5l.pdfIn PDF document text
    • http://gikadoketu.iblogger.org/kekifemakojasebozeruw.pdfIn PDF document text
    • http://ratonawe.iblogger.org/22517375053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467927/normal_5fe614c1368bf.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_fd14ca7637ab47e0b77087dfe3085628.pdf?index=trueIn PDF document text
    • http://xeziredo.epizy.com/kubiwogugesusixepar.pdfIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_1d696c8279624c48ab47f4e9546f8557.pdf?index=trueIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_60081cfa01fc4d8f8145593fe814966e.pdf?index=trueIn PDF document text
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_098670bdf2d944d38803edeaa80b8e50.pdf?index=trueIn PDF document text
    • http://gebilame.epizy.com/5599266986.pdfIn PDF document text
    • https://7be326e9-a1fd-4761-a84c-83c904220737.filesusr.com/ugd/37e945_c18bc2be6f7c486cabe31c494c1fc2d7.pdf?index=trueIn 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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn 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
stream_003_off0000f46a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF46A 17472 bytes
SHA-256: c19c4a5ff920a07b49993a7db5d15f119543507ee9cc5f587f04971c9a902a44
font_00_sfnt_off0000e30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30B 5140 bytes
SHA-256: 61e391c44af066d839827ce802ea4d4992a0a45f7249225a394468c7c24f7786
font_02_sfnt_off0001241e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241E 10548 bytes
SHA-256: 3824894441d303feb8a84e40651726c8447a5d2cec6ad2be411ccf6f06716b9d

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