Malicious PDF — malware analysis report

Static analysis result for SHA-256 d061c969f8c6b2b3…

MALICIOUS

PDF

83.0 KB Created: 2021-03-13 16:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 754f3ef6af8740a56f62c9c685a730d8 SHA-1: 2851545df90e067fc2114818e099aca08986c7c9 SHA-256: d061c969f8c6b2b3db7a9110547fe9ea05db9026764761f6991ff1c07c297fd0
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://mezovuduw.ru/strik?utm_term=how+to+learn+forex+trading+in+pakistan PDF link annotation
    • https://lizoduloto.weebly.com/uploads/1/3/4/7/134701777/sunimogavarewut.pdfIn PDF document text
    • http://jesunekuben.22web.org/twilight_eclipse_full_movie_english.pdfIn PDF document text
    • https://totijavefukaja.weebly.com/uploads/1/3/4/7/134705726/569672.pdfIn PDF document text
    • https://xajerunufunofe.weebly.com/uploads/1/3/1/3/131378991/tifaj.pdfIn PDF document text
    • http://monstergym.ru/short_stories_for_grade_3_downloadh85dm.pdfIn PDF document text
    • https://nuxaluvuwij.weebly.com/uploads/1/3/5/9/135997537/529dcdfd6f.pdfIn PDF document text
    • https://ledajesaler.weebly.com/uploads/1/3/4/0/134041179/d02491e7b3b.pdfIn PDF document text
    • https://basupetuwesaf.weebly.com/uploads/1/3/0/7/130739706/8711a3e1c.pdfIn PDF document text
    • http://am-sound.ru/how_many_pages_in_magnus_chase_book_1hngl4.pdfIn PDF document text
    • https://fometixivoros.weebly.com/uploads/1/3/1/6/131637143/rifaneposofesebu.pdfIn PDF document text
    • http://zomesotemaxage.66ghz.com/wosunifexebatupifa.pdfIn PDF document text
    • https://dapavivilo.weebly.com/uploads/1/3/4/8/134895477/d760051b00.pdfIn PDF document text
    • http://nefritthebestthing.site/lg_lmxs30776s_compressor_start_relaynbdgt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suginutowukig.rf.gd/62100921324.pdfIn PDF document text
    • http://mafovipuvawo.epizy.com/nafoboverunepajafezizem.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/68998443484.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/tintin_comics_full_collection_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/lupemam.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/vozawafakexefavoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/celine_dion_power_of_love_video.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10458 5392 bytes
SHA-256: 2e0d93d19fd5bd72d883f8dd59a77d1d927894062e0b310942e1332b83f984ab
font_01_sfnt_off000116da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DA 11208 bytes
SHA-256: 82c669a67dec88b1ab52827d15efeba34e5ce7d97368a8bca3f62b8e4c80338c

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