Malicious PDF — malware analysis report

Static analysis result for SHA-256 601dc5f3759143a6…

MALICIOUS

PDF

85.2 KB Created: 2021-05-26 15:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e408163873a5e7686351e238677cb9d SHA-1: 9beed94b5ad2a671fcec7b1ed2b50f4714a774d5 SHA-256: 601dc5f3759143a6161a3286c324585794eadf830e409601b74e09bdf1327ac8
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, forming a link farm, with the primary URL suggesting a lure for a game hack download. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host and distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=clash+royale+hack+download+for+android
    • https://cdn-cms.f-static.net/uploads/4495039/normal_603f1b58cf08f.pdf
    • https://cdn-cms.f-static.net/uploads/4386852/normal_600a0de306965.pdf
    • https://cdn-cms.f-static.net/uploads/4421476/normal_605cd4604bb6a.pdf
    • https://mefupawex.weebly.com/uploads/1/3/4/3/134317460/fopol.pdf
    • https://static.s123-cdn-static.com/uploads/4374704/normal_6000b5749e63f.pdf
    • https://cdn-cms.f-static.net/uploads/4370555/normal_6010d4634009f.pdf
    • https://static.s123-cdn-static.com/uploads/4385880/normal_5ff201887b1a3.pdf
    • https://zirakamu.weebly.com/uploads/1/3/1/3/131398357/galug.pdf
    • https://puwiwasoz.weebly.com/uploads/1/3/2/6/132695956/8b82d636f66f37.pdf
    • https://static.s123-cdn-static.com/uploads/4451363/normal_5fca4c50a8d1f.pdf
    • https://subolamamojoga.weebly.com/uploads/1/3/4/7/134719430/dugunotanelapa.pdf
    • https://cdn-cms.f-static.net/uploads/4453575/normal_602a1bb6accb7.pdf
    • https://static.s123-cdn-static.com/uploads/4413108/normal_5fedd22b69a8d.pdf
    • https://cdn-cms.f-static.net/uploads/4408713/normal_601c7e193eb90.pdf
    • https://cdn-cms.f-static.net/uploads/4495400/normal_5fd7c0285bbb7.pdf
    • https://cdn-cms.f-static.net/uploads/4451760/normal_5fe8666367ba4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/b0514bae-6089-4eb3-aa4c-70780e6679bc/24586553739.pdf
    • https://uploads.strikinglycdn.com/files/c0f2a161-0b5b-4a93-804e-a227d33ba03a/activities_to_teach_english_speaking_skills.pdf
    • https://uploads.strikinglycdn.com/files/b1e56d4f-95a2-49d7-9c4a-4590cac0339d/nafewedexovefinigowupubup.pdf
    • https://uploads.strikinglycdn.com/files/8a0a0229-039f-4204-817d-aad73a8c0156/ralobejigekunolefawobu.pdf
    • https://uploads.strikinglycdn.com/files/41ec7684-519c-463e-bc5f-707799144163/miniature_dachshund_puppies_columbus_ohio.pdf
    • https://uploads.strikinglycdn.com/files/f00fca8c-b8ca-47b3-8c9e-a99e41a4ed03/56366431122.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010208.bin
2f49d08c244c729495c1d6aafbdf1f67fe90cc25cd7b755138ac128031bf6c6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10208 5100 bytes
font_01_sfnt_off00011364.bin
642cfa2b81896f9e5913306f531089be59c42269b6e9df9e2e6a82741dc84a79
pdf-font-stream PDF embedded font (sfnt) at offset 0x11364 11020 bytes
font_02_sfnt_off00013885.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13885 4324 bytes