Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f351f26db5d12b…

MALICIOUS

PDF

72.8 KB Created: 2021-03-17 19:59:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fed78aef16666d50535c9e136f8ebf5c SHA-1: 72c84e1c2edec336b9bc6f55c7e5957702726532 SHA-256: 07f351f26db5d12bb6ad4b37b47c725fd7e4d3b5f957930ea1af55eab27abee6
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a prominent heuristic indicating a link farm and an SEO redirector. The primary URL, 'https://midufefew.ru/wix?keyword=sing+2016+online+subtitrat+in+romana', is presented as a lure for a movie download. ClamAV detection and ML classification strongly indicate maliciousness, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://midufefew.ru/wix?keyword=sing+2016+online+subtitrat+in+romana PDF link annotation
    • https://cdn.sqhk.co/gisepavuv/gAWf6Kc/jogakuraxonideluwire.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/hgCghie/5535288540.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/fjdjegc/sakuxexavubajekig.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/Zgdhbgh/push_payment_vs_pull_payment.pdfIn PDF document text
    • http://copyright-central-media.com/4123195463670yee.pdfIn PDF document text
    • https://cdn.sqhk.co/jadidawa/jg9w56N/cuckoo_birds_sounds_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vojazodelud/lUifjbU/57824404818.pdfIn PDF document text
    • http://reweder.site/do_night_owl_cameras_record_audioauys2.pdfIn PDF document text
    • https://cdn.sqhk.co/denirinodo/iijjphh/25809435569.pdfIn PDF document text
    • http://triple-doska3.club/52256772388h8991.pdfIn PDF document text
    • http://tells.fun/tojipuvumiselujujitizadaupm9q.pdfIn PDF document text
    • http://reduslim-shopofficial.site/18280820947jwiwm.pdfIn PDF document text
    • https://cdn.sqhk.co/peretudiwi/hbbjgcm/53265257519.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/diaOdhi/cute_acrylic_nails_designs_tumblr.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/fomaralunex/fodegixuxewowodexitiposud.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/verizon_fios_router_g1100_red_light.pdfIn PDF document text
    • https://eeff404e-5492-4914-a1d7-e39d1f35e6b2.filesusr.com/ugd/e58d70_c274ea9e433844dbb3d7e5682e21d0cb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/begijufadi/autocad_architecture_2018_free_trial.pdfIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_4c5bc317e11f4fd7894b142c8d0b9fb4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rimepusox/fisher_price_laugh_and_learn_jumperoo_puppy_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/76805351255.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/dawizufiruturivagod.pdfIn PDF document text
    • https://de74b992-0de1-402f-a2cc-438209b178b2.filesusr.com/ugd/2693ef_6abfdd2bd5cd4059a05185da01aa042d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/25223606970.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_c777bff75e434f1194b4047815ec9d4f.pdf?index=trueIn 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_off0000db3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3A 5728 bytes
SHA-256: 3b6cf05157125fa8570214135f34b712424848f3e15a57e980c2247716c14858
font_01_sfnt_off0000eea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA0 11684 bytes
SHA-256: a72cb9413497225349d87e16f51d11f8afd440c510ca918f0ee752432d3ac0a6