Malicious PDF — malware analysis report

Static analysis result for SHA-256 7408f124bcb27dc5…

MALICIOUS

PDF

68.3 KB Created: 2021-05-28 00:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: fa09b18db5f16901577fc47b93448145 SHA-1: 835835c6821abacbba6b811350f20bd6d4d55be0 SHA-256: 7408f124bcb27dc58fdfb8659c0cfbad780b2aaac60b4f71ac3cdea234710764
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in SEO link farms or phishing campaigns to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content, possibly exploiting PDF vulnerabilities or social engineering.

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 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.
  • 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://kuzutuzo.ru/123?utm_term=anthony+robbins+books+free PDF link annotation
    • https://wuxelulomevadi.weebly.com/uploads/1/3/4/9/134904547/bemisixowisi_wewomugerinavu_zumomatatoga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503874/normal_6058aa31ba51e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490936/normal_5fd177d654501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490269/normal_6046bad0b694c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465125/normal_601db0be63107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477873/normal_5fd38b15edf78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454671/normal_604d39500b273.pdfIn PDF document text
    • https://funopazotasar.weebly.com/uploads/1/3/1/0/131070342/noregonelude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_605d7c73937fa.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4369333/normal_60aff3bdecc87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451542/normal_606b8249040c2.pdfIn PDF document text
    • https://dorubirema.weebly.com/uploads/1/3/4/3/134317311/pavuri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494866/normal_6067f892e347c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446646/normal_6062e199508c1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/01cf4f1c-bec1-4930-a12a-0910e578a414/cen_tech_battery_charger_code_ef02.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d422d2eb-9213-46ba-a9ae-554b3286234f/diletetorurasagubezupubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4227718-9454-4673-89d5-adc756d76a02/29436093297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c413ef-60eb-459c-8db0-791b737fc7f4/67142164199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d21ff13-5603-42bd-8477-62172299c7b2/funny_books_for_8_year_olds.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_off0000cd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9D 4908 bytes
SHA-256: 16bc02446e93dfec0d5ef3427b680bb764bb018dcecc1f7eac0d843ea860e9fe
font_01_sfnt_off0000de57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE57 10984 bytes
SHA-256: 514169b0024ad67c1981eb56552be0d343d08d171874bcab605484658daf3a8c

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