Malicious PDF — malware analysis report

Static analysis result for SHA-256 0467b4d7557a2db6…

MALICIOUS

PDF

65.8 KB Created: 2021-04-03 09:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b418de261ce2006ce493695e34e941c3 SHA-1: 46691798cc0267f2e7b9a62ae9b06ce5690ae4d3 SHA-256: 0467b4d7557a2db60e681ac4a2deb1a59aa6d631f29bf7e73edaf5f7d8a5cb4e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including a prominent link farm heuristic, suggesting a malicious intent to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML classifier score further support this. The embedded URLs, such as 'https://fokemale.ru/123?utm_term=alale+chittalale+song++in+telugu', are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/123?utm_term=alale+chittalale+song++in+telugu PDF link annotation
    • https://tajuzoliv.weebly.com/uploads/1/3/4/3/134359899/8388207.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/cqgiagf/hot_rod_lincoln_video_asleep_at_the_wheel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407306/normal_603a790baf142.pdfIn PDF document text
    • https://cdn.sqhk.co/valipovu/hoS9Fhe/koine_greek_pronunciation_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465388/normal_60125f5de20de.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/Tid16Vy/mario_kart_racing_online_free.pdfIn PDF document text
    • https://jososipiwudamuw.weebly.com/uploads/1/3/2/7/132740918/3491204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_6028087999f1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417046/normal_5fddc33c319ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392649/normal_600a1502b4d63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458856/normal_60427abeb0858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463006/normal_60602f152e4e3.pdfIn PDF document text
    • https://netexebi.weebly.com/uploads/1/3/0/8/130815192/5914837.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/eab5e7f1-c2b8-4539-b9b3-0b4648b1f1c6/vawasajotimusugopoferipab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7688786b-2b04-4810-aae0-4a9e32bcda9f/pagulisiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e4af102-28a9-436b-9794-0c51f0107c2e/troy_bilt_3550_generator_5250_starting_watts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b45f4df-3c8e-44a4-a500-b7c7b2a0abda/tukekodakagogagimotege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/331d0807-1c00-4942-a401-601677c9211b/xiduzex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9c1ea23-a24d-4511-9def-120987e9f9ae/85137125139.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_off0000c4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F8 4956 bytes
SHA-256: a4fe471081ff1fec6837bc2145de1ff9cf59d0a2ee09a90ff4aee9b18755e733
font_01_sfnt_off0000d5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D3 10124 bytes
SHA-256: 1d9c5324d0b8bfacb7c05a726053b29e37e2ff8349074d61f6a2e0c38be57919

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