Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ec1329187adce3…

MALICIOUS

PDF

97.5 KB Created: 2021-03-13 15:58:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61becba5fa9162637f9122567289faab SHA-1: b57a3c347eed20ff4829a799b891a4000377a323 SHA-256: e7ec1329187adce36514215c857ac2cd2fc9d0c93b45207eb6ad1fe29d2bac88
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to a network of websites. One such link is https://lozipotod.ru/aws?utm_term=plato+republic+grube, which appears to be part of a link farm designed to manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution through these linked resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=plato+republic+grube
    • https://towoxaji.weebly.com/uploads/1/3/0/7/130740158/9415322.pdf
    • http://select-get.top/hacking_bangla_book_freel3udi.pdf
    • https://napuguvu.weebly.com/uploads/1/3/0/9/130969658/4678471.pdf
    • https://wisetigu.weebly.com/uploads/1/3/4/3/134357320/julofonifujo.pdf
    • https://bewimesev.weebly.com/uploads/1/3/4/7/134753962/c0905a02d.pdf
    • https://ragixadimeruwu.weebly.com/uploads/1/3/4/8/134897014/1e15e4.pdf
    • http://pochta-24.cc/what_is_the_starting_salary_for_electrical_engineering65q55.pdf
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/zadelogaromu.pdf
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/7135e87.pdf
    • https://furivupes.weebly.com/uploads/1/3/5/2/135295821/7718853.pdf
    • https://voxudipuxun.weebly.com/uploads/1/3/5/3/135319737/vumewamalufapofef.pdf
    • http://circulshtangcalip.website/vejevananopimefixdesq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fajujiju/gedabanudojefetow.pdf
    • https://s3.amazonaws.com/jewizopukuni/cydia_eraser_ios_10._3._3.pdf
    • http://jimomurapujivo.onlinewebshop.net/bayesian_survival_analysis_ibrahim.pdf
    • http://lojabupabavize.onlinewebshop.net/wanowopivuniwotigi.pdf
    • https://uploads.strikinglycdn.com/files/3e3cf73d-c53b-4dc8-8572-927d454b1f68/69751473104.pdf
    • https://uploads.strikinglycdn.com/files/2c2050e5-7b0e-48e1-8f88-564c5c625460/final_fantasy_7_remake_part_2_release_date_ps4.pdf
    • https://s3.amazonaws.com/zasepo/alan_watts_this_is_it_book.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_off0001317a.bin
36c8659fc3f8db205f986bf4225808edb23ca375cb35cb89e9ea30354da00309		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1317A 5064 bytes
font_01_sfnt_off000142c2.bin
4108f7a1e844714c710bf455da0a677281e58f7054ef6cea68258948ebeaf84e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142C2 19556 bytes

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