Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf0d342c0d4fe9b…

MALICIOUS

PDF

70.9 KB Created: 2021-02-02 22:30:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f43209e4cde40e12ffa58a1a9e3461c4 SHA-1: daf5fdd35b3db6365d1a921987fb697a92ded000 SHA-256: 6cf0d342c0d4fe9b8d940be8d1e1f8161a3550e33ba7e672d6a9741a096c078f
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with heuristics identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/aws?utm_term=kgf+chapter+2+trailer+telugu PDF link annotation
    • https://vusowixaxepuw.weebly.com/uploads/1/3/1/3/131381533/2897db.pdfIn PDF document text
    • https://cdn.sqhk.co/befulirawid/PgeeIij/car_lease_calculator_south_africa.pdfIn PDF document text
    • https://cdn.sqhk.co/kadeposamo/OfY2igg/tofewejidivuboj.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/lijexegoridiba_tinipexu_rozonuvuvajupab_moxusexa.pdfIn PDF document text
    • http://gratoramaa.website/53514685372jnumf.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/vaton-katufodag-temomilidax-fuwuvexidez.pdfIn PDF document text
    • https://pubodepilup.weebly.com/uploads/1/3/1/4/131406337/74e9538f9b3d69.pdfIn PDF document text
    • https://cdn.sqhk.co/novozefox/iahahfH/morimikunud.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/jX5bMyJ/65441904234.pdfIn PDF document text
    • https://wotipufa.weebly.com/uploads/1/3/1/0/131069738/4738427.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/girexusineradet-kumaw-lowegisemid.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/donulepuwaluz-nisex-vanumawewenej.pdfIn PDF document text
    • https://fizegebukuri.weebly.com/uploads/1/3/1/4/131453213/lemugusakiwiwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470543/normal_5fd619b59c3f7.pdfIn PDF document text
    • https://telazavax.weebly.com/uploads/1/3/4/7/134729689/56be2f.pdfIn PDF document text
    • http://matodobotosirom.66ghz.com/pikuvenukiwut.pdfIn PDF document text
    • http://dovulup.iblogger.org/aircraft_maintenance_manual_boeing_777.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xasazotim.rf.gd/toram_online_leveling_guide_150.pdfIn PDF document text
    • http://wojodiguf.rf.gd/dimogir.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_off0000da4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4C 5200 bytes
SHA-256: 7ec7a615bbe5403ce8100cc60aedebe7aec553d22228c64c092ee5f83366621e
font_01_sfnt_off0000ec11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC11 10168 bytes
SHA-256: 433e21a5946184a2d3c6cf90484e7e70f6d204fdc7967d3af35d399322d093b5

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