Malicious PDF — malware analysis report

Static analysis result for SHA-256 630cb14de50b662b…

MALICIOUS

PDF

76.1 KB Created: 2021-04-26 16:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25916f45b304e70f672226131147b4c1 SHA-1: ac9abe75e185faac26b553bef4d11bf62b1f4ec5 SHA-256: 630cb14de50b662bab2d586d14048d05de9cdcea92a3b3ee2a60c389d0cb4306
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or redirection mechanism. The document's content, though obfuscated, appears to be a lure for an advance-fee scam, potentially related to diet or prize winnings, and includes URLs that likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://pelibifir.ru/strik?utm_term=flat+belly+diet+shopping+list
    • https://sajefabavasa.weebly.com/uploads/1/3/2/7/132710755/4658eebba6f.pdf
    • http://ligugiban.scienceontheweb.net/jee_b._arch_paper.pdf
    • http://tajumizigareni.iblogger.org/40106110026.pdf
    • https://cdn-cms.f-static.net/uploads/4472776/normal_5fe902ba00b3c.pdf
    • https://sagojuxejuzogug.weebly.com/uploads/1/3/4/5/134598596/junijilunezabef_bakuwis_romivufupi_rufewezuzanuxu.pdf
    • http://nipijapogila.sportsontheweb.net/gold_gym_treadmill_lube.pdf
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/dabelowumurexiregi.pdf
    • https://static.s123-cdn-static.com/uploads/4366399/normal_5fc796c72f0b8.pdf
    • http://wapadax.scienceontheweb.net/oxford_dictionary_of_banking_and_finance_free.pdf
    • http://kitukotobov.medianewsonline.com/halloween_word_search_easy.pdf
    • http://saniwofixapu.mygamesonline.org/91726848307.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gikuxoxabak.epizy.com/ergonomic_considerations_in_machine_design.pdf
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_dacbe3c1e1b547a189a929a073588ddf.pdf?index=true
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_0b0f88a90bf544fdb8ddae4602825c26.pdf?index=true
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_a1548b1840144e56aea6e336c61d560f.pdf?index=true
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_93a58c838fa04b1eb9104b6324a64d0b.pdf?index=true
    • http://rewexukid.epizy.com/guvonuxenuzux.pdf
    • http://fimogaselan.rf.gd/letter_format_for_job_transfer.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb5a.bin
8304209de61d022e3b1fb54bc27c43ba201da9a8d21a84175c093efc7b5a366a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5A 5320 bytes
font_01_sfnt_off0000fd77.bin
d5567c9ab9b11805e761ea3dc28dce4bcc6d47841e0b91d03f3eb945c5f80dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD77 11152 bytes

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