Malicious PDF — malware analysis report

Static analysis result for SHA-256 10679a4918963135…

MALICIOUS

PDF

87.5 KB Created: 2021-03-28 21:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b14873c493edc70f66b5b8306cbc6f3a SHA-1: d762ce3ec501068dfd8e5bba8e7055ea94c3628c SHA-256: 10679a4918963135cc810a06816077dcd8b6034ba67b7fa84ae1c83ab56b9e43
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, potentially indicating it was generated as part of a lure. The presence of external URIs and a link farm heuristic strongly suggests the primary goal is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://bologen.ru/award?keyword=campo+santo+sebald+pdf PDF link annotation
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/wuwonixotuva-zibisomofobi-lifed.pdfIn PDF document text
    • https://raxefikijizusiz.weebly.com/uploads/1/3/4/8/134881470/tofojo.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/JQjf4Q9/goat_simulator_xbox_one_local_multiplayer.pdfIn PDF document text
    • http://tetupamino.mywebcommunity.org/mozasepipobitajeme.pdfIn PDF document text
    • https://mabavelege.weebly.com/uploads/1/3/0/7/130775551/8924674.pdfIn PDF document text
    • http://lilozekakotelup.sportsontheweb.net/98766979660.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/jepuzonedag.pdfIn PDF document text
    • http://pelabinowoguk.getenjoyment.net/gokikojajivut.pdfIn PDF document text
    • http://guzolupe.iblogger.org/87221999627.pdfIn PDF document text
    • https://cdn.sqhk.co/bozawenibiwa/9xgiyia/dead_man_walking_analysis_movie_essay.pdfIn PDF document text
    • https://xilivixawigilu.weebly.com/uploads/1/3/4/6/134672458/088956d99d44.pdfIn PDF document text
    • http://dutebolidetol.iblogger.org/jijirefuxivo.pdfIn PDF document text
    • http://podekupe.22web.org/5349507388.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/I7riegc/zadogikovewimej.pdfIn PDF document text
    • http://jozebemi.iblogger.org/multivariate_statistic_regression.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zisukuvi.atwebpages.com/pukikimirupitutidowawiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9150625-37b4-4759-a0a0-6f748be20090/72306338280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/504fa726-1409-4b52-bb98-e2e309507bf3/motowiertarka_bosch_pbh_2100_re_cena.pdfIn PDF document text
    • http://saduxax.epizy.com/anne_marie_do_it_right_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c955c70b-a49a-4a52-9993-5310758554f5/funasune.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_off000102d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D4 5136 bytes
SHA-256: 209d3e0145f9420c15cff24f063640f21b5d33b4249b8e0ef57b1440f6303f62
font_01_sfnt_off0001142f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142F 11844 bytes
SHA-256: eec657d4e3d67dd1076e62e05e9c4e9096869c225ddd21c3cc33d9497fd08c35
font_02_sfnt_off00013b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B60 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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