Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc0446f69556812…

MALICIOUS

PDF

78.8 KB Created: 2021-01-29 23:57:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8c5fa56053efbda2da3119007dc794da SHA-1: 1db2cc6af1b5a8bf782b49589c8030f52d0979f4 SHA-256: 3cc0446f6955681242669d8cb12c5708bc91855bf34217f62533ac96e59ff107
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=desert+storm+basketball+phoenix PDF link annotation
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/jatux.pdfIn PDF document text
    • http://xofazonir.iblogger.org/tiwidenuvudedevabinozi.pdfIn PDF document text
    • http://likelid.xyz/vizetofitewuterazi5ccqq.pdfIn PDF document text
    • https://fafafavavilaba.weebly.com/uploads/1/3/4/8/134893162/2b0b15b025f5.pdfIn PDF document text
    • https://cdn.sqhk.co/tadeketoxab/W4Qgg6M/trap_dungeon_2_water_level.pdfIn PDF document text
    • http://dixojele.22web.org/69102510935.pdfIn PDF document text
    • http://dabutaxezopis.iblogger.org/89787224887.pdfIn PDF document text
    • https://gepadera.weebly.com/uploads/1/3/0/7/130740344/8454027.pdfIn PDF document text
    • http://rexifiru.iblogger.org/etiologia_del_cancer_cervicouterino.pdfIn PDF document text
    • http://lefenup.22web.org/simawududefu.pdfIn PDF document text
    • https://gamitodotabezoj.weebly.com/uploads/1/3/1/4/131453651/gozidijejujo-givexigunusadu.pdfIn PDF document text
    • https://cdn.sqhk.co/fovipobex/gdyGgiw/37478625459.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/jcjjVhc/drive_in_movie_theater_nj_woodbridge.pdfIn PDF document text
    • https://cdn.sqhk.co/gipudeviwapi/hc1bgid/bavugipuje.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/ia7gfCs/jumovenaviwimogiwet.pdfIn PDF document text
    • https://cdn.sqhk.co/kofuvufexo/hVhjhcJ/the_curse_of_the_mushroom_king.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nikalokibutoxes.rf.gd/iicsa_nottingham_report.pdfIn PDF document text
    • http://xesewopalokix.epizy.com/21747188679.pdfIn PDF document text
    • http://jekowatu.epizy.com/argus_the_unmaker_lfr_guide.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_off0000e8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E8 5332 bytes
SHA-256: e31ebe13c04cb42a52d0b0ed5dee353350e280f4eb7020c9c3824873b952d9a6
font_01_sfnt_off0000fadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 16892 bytes
SHA-256: 92687415d92c0b50826f9c23d1820c6cfa8017ac8f8d66757a4d58c78f175019

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