Malicious PDF — malware analysis report

Static analysis result for SHA-256 515e231502aaa48f…

MALICIOUS

PDF

81.3 KB Created: 2021-01-27 08:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7d8705178890629584b247a7fb32f7b8 SHA-1: 7264942db81c2c1234852ba27603586399792ef1 SHA-256: 515e231502aaa48f4b87341038049bea8a654061b4e240dd2e17ae4bf7b883a2
224 Risk Score

Malware Insights

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

This PDF document employs an advance-fee scam lure, attempting to trick the user into clicking a link. The link points to known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or exploits. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=110+volt+portable+electric+winch In PDF document text
    • https://cdn.sqhk.co/gediwuwanol/bkhhq5n/rock_music_bands_of_the_80s.pdfIn PDF document text
    • https://sizasoko.weebly.com/uploads/1/3/1/3/131384227/4be16eae1cf.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/3181551.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/eUt6eih/spaceballs_quotes_cousin.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/hjifgq1/59464328902.pdfIn PDF document text
    • https://cdn.sqhk.co/xeliwiwogivo/3jfvZum/donogikare.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/jdo8Zjj/secret_of_mana_2_rom_fr.pdfIn PDF document text
    • https://faboduvo.weebly.com/uploads/1/3/5/3/135343103/gazogevagesuwaxafa.pdfIn PDF document text
    • https://gutoserenenew.weebly.com/uploads/1/3/2/6/132681448/e2e5f029.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/ibjigi4/mulozil.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/bicL3ie/33626301907.pdfIn PDF document text
    • https://simisodiguguvig.weebly.com/uploads/1/3/5/3/135324772/2c798a998.pdfIn PDF document text
    • http://umdtheatre.ru/tezufisodv9juo.pdfIn PDF document text
    • https://datokusowijodo.weebly.com/uploads/1/3/0/7/130776434/kabusamedutunifero.pdfIn PDF document text
    • https://lanapovo.weebly.com/uploads/1/3/1/4/131437145/a466549bc75c95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10138 5236 bytes
SHA-256: adaedb5ee713661ef2c72cda1e28a39bb5f374e01898c60f71db2d04ca12833e
font_01_sfnt_off00011314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11314 10892 bytes
SHA-256: af1a96696d4c182830052efb494527edb1fe97412654d5507e5b9959cfde3c26

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