Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59238528c1ec4a2…

MALICIOUS

PDF

81.3 KB Created: 2021-02-25 20:42:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 366171887787a4871bddc4be5012696b SHA-1: 84472cee708729be250079da5c4a70f3dcda0dfb SHA-256: e59238528c1ec4a2dc406d03e88887b3b2d3b4780c0e94194bcf2f4e789eefcb
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://jacksth.ru/wix?keyword=billerica+public+schools PDF link annotation
    • https://pebufaso.weebly.com/uploads/1/3/5/4/135400671/loremelakinifudov.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/agi2Zjh/air_attack_ads_game_online.pdfIn PDF document text
    • https://tunilawogipafex.weebly.com/uploads/1/3/2/8/132814387/mowezilafo.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/auwhhjb/ancient_civilization_history_channel.pdfIn PDF document text
    • https://korudodigujoko.weebly.com/uploads/1/3/0/7/130740169/pufepe_vuviviwofoga_sivinurepapixa_lakuligisokapev.pdfIn PDF document text
    • http://vuvufese.22web.org/intel_nuc_nuc6cayh_datasheet.pdfIn PDF document text
    • http://difijeso.iblogger.org/ponena.pdfIn PDF document text
    • https://kibasixeb.weebly.com/uploads/1/3/1/4/131438563/vegeze.pdfIn PDF document text
    • https://zivukiwele.weebly.com/uploads/1/3/4/7/134749768/4cb64.pdfIn PDF document text
    • https://nuralizowipu.weebly.com/uploads/1/3/4/6/134693001/lulupijutup.pdfIn PDF document text
    • http://pukutabutosu.22web.org/ledevafobubanubijivesix.pdfIn PDF document text
    • https://vikabedegopeve.weebly.com/uploads/1/3/0/8/130874339/5279896.pdfIn PDF document text
    • http://tederurokeroga.iblogger.org/67208583123.pdfIn PDF document text
    • https://gavanigo.weebly.com/uploads/1/3/1/3/131380609/zojelek.pdfIn PDF document text
    • https://benezome.weebly.com/uploads/1/3/5/4/135400217/tuwabopeka-setisekenelu.pdfIn PDF document text
    • https://ramokazadi.weebly.com/uploads/1/3/4/4/134470245/pemeju.pdfIn PDF document text
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/92ff7cc6c529181.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gitogopafo.epizy.com/milulobab.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10291 5212 bytes
SHA-256: 571bfab4b65d0288115040c2ce964b5a77fd74b1d8a89ba5077b9be5fc2451c7
font_01_sfnt_off00011439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11439 10624 bytes
SHA-256: 3f574e855ae33d327c44364df36a25350aa5fa7f370e0e05cb48c453f5f83702

Open this report in the interactive analyzer, or submit your own file for analysis.