Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0315d86536d453b…

MALICIOUS

PDF

84.8 KB Created: 2021-03-16 15:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd11932888d53d11a28ba14097888f6d SHA-1: ed6a18a5c0f9d4f633f74e3bd92b582985a8d566 SHA-256: b0315d86536d453b2cd73ac8ea52c76a2a9140ea69e3618a44f11c6394f30db0
176 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick users into calling a phone number, a common tactic in tech support scams or phishing schemes. The presence of numerous external links, including a link farm, further supports a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://zajinet.ru/strik?utm_term=nordictrack+commercial+x22i+weight
    • https://labimatejodo.weebly.com/uploads/1/3/2/3/132302966/2946564.pdf
    • https://cdn-cms.f-static.net/uploads/4367960/normal_6015d2860e4f3.pdf
    • https://cdn-cms.f-static.net/uploads/4462066/normal_600faf839daee.pdf
    • https://konevolog.weebly.com/uploads/1/3/1/6/131606720/demaf.pdf
    • https://static.s123-cdn-static.com/uploads/4404757/normal_5fe5445f0e3a2.pdf
    • https://jodegometokak.weebly.com/uploads/1/3/1/6/131606115/a85da03.pdf
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/nidumib.pdf
    • https://gagebopa.weebly.com/uploads/1/3/6/0/136051288/gumukevekof-masan-sazudip-zepezedavule.pdf
    • https://jubipolofolexi.weebly.com/uploads/1/3/2/3/132302872/f4090ad8e.pdf
    • https://serataxufo.weebly.com/uploads/1/3/1/6/131606193/7751563.pdf
    • https://labupapem.weebly.com/uploads/1/3/1/4/131406977/8165665.pdf
    • https://cdn-cms.f-static.net/uploads/4383577/normal_5fd9792163c4c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/xebuvuwov/zuzupisozemakune.pdf
    • https://s3.amazonaws.com/pisedij/biruzufi.pdf
    • https://s3.amazonaws.com/rivazixexuguri/59373272948.pdf
    • https://s3.amazonaws.com/zidosozawok/hills_t_d_feline_feeding_guide.pdf
    • https://uploads.strikinglycdn.com/files/d77f2100-95c2-458d-a388-7c6c2fb0f5ed/47470274691.pdf
    • https://uploads.strikinglycdn.com/files/d75cee47-710a-4f00-8027-0a1c8bce5fa3/jbl_flip_3_turn_off_startup_sound.pdf
    • https://uploads.strikinglycdn.com/files/619d9c62-ca4c-47fd-89c7-2cad26f50a14/how_many_red_aces_are_in_a_deck_of_52_cards.pdf
    • https://uploads.strikinglycdn.com/files/e9c82d74-2b8a-4e52-9146-c0419fdc16ca/tutim.pdf
    • https://uploads.strikinglycdn.com/files/3af1db89-6318-4056-b99f-c5facd1770da/53217002238.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_off0000ff73.bin
3cd338c705c9d1a58270c090ae521d01ea0a79b1f630e1434f473c52b34d6151		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF73 5180 bytes
font_01_sfnt_off0001112e.bin
2e9d77eb383c29c226528de43b93900f865d861da7548b44652cd22576910a54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1112E 11548 bytes
font_02_sfnt_off0001374d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1374D 4324 bytes

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