Malicious PDF — malware analysis report

Static analysis result for SHA-256 3705600b7aa7be9b…

MALICIOUS

PDF

89.0 KB Created: 2021-04-05 12:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02587d51af5db2b6d99abeccf10529ae SHA-1: 12422fc7c314b6af140964f4351639d2ba6f3599 SHA-256: 3705600b7aa7be9b84c5cf105139815f6af2e67d392b976996e17e4ff02fc001
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, many of which are to PDFs, suggesting a link farm or SEO manipulation tactic. One of the primary external URIs points to 'lozipotod.ru', which is likely part of the malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/award?keyword=workability+of+concrete+pdf
    • http://talajifit.mywebcommunity.org/11842273295.pdf
    • https://matomuzunoto.weebly.com/uploads/1/3/5/3/135389802/0a499d1.pdf
    • http://uscovidcharts.com/71935764973l4img.pdf
    • http://front-glass.space/mlb_injury_news_2020sh6hb.pdf
    • http://volelovapudexif.scienceontheweb.net/83925123338.pdf
    • http://sale50.pro/81044045589inmkb.pdf
    • http://nujagexurej.medianewsonline.com/alta_fidelidade_download_gratis.pdf
    • https://betutinixe.weebly.com/uploads/1/3/4/4/134481053/ea626bf.pdf
    • http://vinnipoh.space/mogosevgp2q.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dobesogum/47026160535.pdf
    • http://zimopup.myartsonline.com/baghdad_pact.pdf
    • https://s3.amazonaws.com/wifiduxezo/padixoluvutamasilalif.pdf
    • https://4f7f339c-9ee9-4921-a7ad-794169edd555.filesusr.com/ugd/fea72b_27f19b6c17d64c52a2e08dc567fe3872.pdf?index=true
    • https://s3.amazonaws.com/faxaxos/wizudove.pdf
    • https://a35b4eae-300a-44a5-b982-8d633984e519.filesusr.com/ugd/19735e_1dac8873111c47839a9d16bcf84d828c.pdf?index=true
    • https://s3.amazonaws.com/xijalovelokolep/92077461964.pdf
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_9eff3ae1d6fa4aec8ba4603e2351a89e.pdf?index=true
    • https://s3.amazonaws.com/satuja/ine_ccna_workbook_free.pdf
    • https://9cc02d22-446e-415d-9686-6e49aadcb3b3.filesusr.com/ugd/aa6a08_8a0d17508c2849fda559b30854276758.pdf?index=true
    • https://68a74d12-89ac-4a94-b826-09ad332a30bf.filesusr.com/ugd/1a0392_785e27cd455e4c77b631099e2947e976.pdf?index=true
    • https://s3.amazonaws.com/tojazudibumogab/mathswatch_ratio_homework_answers.pdf
    • https://s3.amazonaws.com/voropa/black_and_decker_drill_bit_set_lidl.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ea5.bin
76fa256f6b72d8e54c5285610ad68d7ca667fdf90f2f741e7855b2c73c97788a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA5 5292 bytes
font_01_sfnt_off000130ca.bin
24a0a14b8bf6c1573d638049634ab3e77e3b7b1aec6b668f58cb508bededd7a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130CA 11220 bytes

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