Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a02577efe8a08c…

MALICIOUS

PDF

76.8 KB Created: 2021-09-04 14:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7b5d66aed9cf8feec65acdb34c688351 SHA-1: 39f7da2a6cf9180d73c5f1fe19b08be381932377 SHA-256: 69a02577efe8a08c2dba84facf14bbe5b5e5adcf1e29fbeddf43d043eba0da56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs hosted on compromised or disposable domains. These links likely serve as a distribution point for phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://laborke.ru/uplcv?utm_term=circular+motion+examples+pdf PDF link annotation
    • https://termokingbt.com/ckfinder/userfiles/files/78756793292.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/7606c9b565425ab7ad284171565d482d/werobemijakow.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/3aiqj41ofpd11b93b2j61os5s2/nofot.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/88538624729.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/a76aac1eed061c7ee7727e69613f2d16/kosupov.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/14250365749.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/zoloziwotaxejuv.pdfIn PDF document text
    • https://merohamro.com/ckfinder/userfiles/files/kekadabofopuvujexoses.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/9b87329c605a830fd23b58cfd6b163d1/60354079101.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/14478787169.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/29pdgaa9inj7rou4klmvamar56/86983368129.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607513607823b---38883941076.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/41865461720.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/710d226277cb28878df7abd98abe2054/98686467794.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/pokijivusizebafuva.pdfIn PDF document text
    • http://specimport.by/files/files/xogun.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c72ea1ff5c---godagelaravetavufemat.pdfIn PDF document text
    • http://ipllaser.in/uploads/xajejagabalaxupiw.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/arptgnlene33immq0u4ta5c7vd/bidebijijewof.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/36834329447.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160e3276914ce7---zepizolinawivozasarinape.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/rufuwu.pdfIn PDF document text
    • http://smm-mm.com/uploads/news_file/16666144120.pdfIn PDF document text
    • http://deckdreams.ca/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/texumeluxiwepifuwi.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C6 17516 bytes
SHA-256: 084b0024b482bd8e12f23e56daf44b41d7a93f9caa24200bfeebf95aadd56d76
font_01_sfnt_off0000f3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E0 11012 bytes
SHA-256: ff01b1928f141b044c124df396805662b2442bd074ee36a310505d19abe00b25
font_02_sfnt_off00010d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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