Malicious PDF — malware analysis report

Static analysis result for SHA-256 402769004403257f…

MALICIOUS

PDF

79.2 KB Created: 2021-03-29 17:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 49ec6f13c62f8558b53f50052730f820 SHA-1: 39ae284ec1df1494cec3bcf1f9a20cc92158ec29 SHA-256: 402769004403257f335911896396c9bab4f356499f2b1f38dfb7ab6c00f33628
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous external links, suggesting a link farm or redirection tactic. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to lead users to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/award?keyword=anatomia+da+hernia+inguinal+pdf PDF link annotation
    • https://zugatesek.weebly.com/uploads/1/3/6/0/136082504/931482.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/7iaihhh/big_bang_actor_ages.pdfIn PDF document text
    • http://fortysgjdk.fun/1518470168nsrmr.pdfIn PDF document text
    • https://xefanopebowemid.weebly.com/uploads/1/3/2/6/132681782/0a6f4e.pdfIn PDF document text
    • http://podarokinsta365.site/6825865551aj1j5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_5fdbce4b32d1b.pdfIn PDF document text
    • https://cdn.sqhk.co/bufudoraxala/8C4Xij3/guess_the_emoji_movies_level_6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479235/normal_601eda5267a63.pdfIn PDF document text
    • https://dizoxagesok.weebly.com/uploads/1/3/4/3/134363212/de853bfd425e473.pdfIn PDF document text
    • http://idealslimitaly-official.site/how_atoms_can_combine_to_form_new_substances_by_describing_the_role_of_bonding54c4k.pdfIn PDF document text
    • http://pivowave.iblogger.org/zavugurisalure.pdfIn PDF document text
    • https://cdn.sqhk.co/potonefamuve/TjherME/bufinele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403684/normal_6040d9cddee3b.pdfIn PDF document text
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/lexowozewevelesa.pdfIn PDF document text
    • http://gemajesubon.22web.org/66190718548.pdfIn PDF document text
    • http://naturagrush.space/eurosport_germany_tv_guidendp6t.pdfIn PDF document text
    • http://flebolog24.com/nabigikososogoxepowails1b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/gibufu.pdfIn PDF document text
    • http://wanuzenupikow.rf.gd/jodexiditalusudenevop.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/92515895737.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/building_drawing_n3_study_guide.pdfIn PDF document text
    • http://vexidolovosope.rf.gd/mozilla_firefox_version_51.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/what_does_priority_deadline_mean_for_fafsa.pdfIn PDF document text
    • http://dakozel.epizy.com/fujebewizovujutaxowaja.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_off0000fa10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA10 5264 bytes
SHA-256: a1c9a7584c6f05465bf54f65a0c9ff7f95a6d466da6df56c9dd9bb3c950465e2
font_01_sfnt_off00010bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD1 10240 bytes
SHA-256: 3eca899c9c99b8c1ce7e8abc5f1ec3466bb7ac9fe351200cf27e739249f15f50

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