Malicious PDF — malware analysis report

Static analysis result for SHA-256 342e1bbc004eae51…

MALICIOUS

PDF

86.3 KB Created: 2021-05-28 16:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7cf9a1c46300d7a734cd5060506b79e5 SHA-1: 5a9362e03ed7baff11a00b0a35684bf3c32cff06 SHA-256: 342e1bbc004eae5178151dda66e94cb78412163776b010d5150c1bd328d11070
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yafferge.ru/strik?utm_term=fox+news+live+app+for+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4465259/normal_600bf5bfa10aa.pdfIn PDF document text
    • https://xenapake.weebly.com/uploads/1/3/4/3/134353424/1d92b0ffa17.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/kewas-sogelexezanezu-fulif.pdfIn PDF document text
    • https://fozunisomizu.weebly.com/uploads/1/3/4/6/134666093/fekarexob_lejoliga_dudubakonagerip_mebomexovev.pdfIn PDF document text
    • https://zamizugupaf.weebly.com/uploads/1/3/3/9/133999186/fatikutekozejeke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407314/normal_5ffe21dd52eea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422627/normal_5fe3b53e2e6cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427529/normal_5fdf4db01c76f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470409/normal_5fdfac1f598fb.pdfIn PDF document text
    • https://ziwarojuwetupo.weebly.com/uploads/1/3/4/3/134343479/f0e72.pdfIn PDF document text
    • https://gakubuzavesow.weebly.com/uploads/1/3/0/8/130813888/9237896.pdfIn PDF document text
    • https://kibopomirisusi.weebly.com/uploads/1/3/2/7/132741064/9779644.pdfIn PDF document text
    • https://rigepapesoruzu.weebly.com/uploads/1/3/4/5/134519565/wurubuwa_bunafeji.pdfIn PDF document text
    • https://dofufegudi.weebly.com/uploads/1/3/1/3/131381881/3687226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_60300ae06e704.pdfIn PDF document text
    • https://xojoguxivizu.weebly.com/uploads/1/3/4/0/134096407/ea7199f1353f.pdfIn PDF document text
    • https://zojipulororasa.weebly.com/uploads/1/3/6/0/136011419/lugidaberutetamap.pdfIn PDF document text
    • https://nanuvofekoredam.weebly.com/uploads/1/3/5/3/135385966/4654741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418369/normal_606c158a5ede1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b78eead-e595-499c-b2ce-e44618fe24a6/5859371184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9047fef-262b-4e66-999f-04b21f4894a2/98963402075.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://scripts.sil.org/OFLIn 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_off0000fd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD67 5184 bytes
SHA-256: aeec3a619a4eaa8a2c22d99f9c4926b5116fa46d108352eaad21032f93b159fc
font_01_sfnt_off00010f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3D 11640 bytes
SHA-256: aa07a5f81678c55977699710368f3ded3397bc80de8044e974701b1354d60719
font_02_sfnt_off00013730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13730 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330