Malicious PDF — malware analysis report

Static analysis result for SHA-256 314632875b818bf2…

MALICIOUS

PDF

72.1 KB Created: 2021-02-08 22:27:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 94695bbf36565f0e1655748327e9bb8d SHA-1: c943657f0e1031bf29fb634bc3f41e38e7c74e85 SHA-256: 314632875b818bf264d572234780c889dea7d93788e94fbc98e1d4a4f242315c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a malicious intent to redirect the user to potentially harmful content or phishing sites.

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://bologen.ru/wb?keyword=ben%2010%20omniverse%202%20game%20%20ppsspp PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375070/normal_60099e23763ea.pdfIn PDF document text
    • http://nofuwev.iblogger.org/liwav.pdfIn PDF document text
    • https://rogusavonovupe.weebly.com/uploads/1/3/3/9/133997589/550a4a20.pdfIn PDF document text
    • http://natur-bio.space/broken_angel_status_songj9fxy.pdfIn PDF document text
    • https://xodumusekow.weebly.com/uploads/1/3/4/7/134708755/5924968.pdfIn PDF document text
    • https://webegerux.weebly.com/uploads/1/3/4/7/134759049/69877c815c2006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409413/normal_5fd68a3033e4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384035/normal_600492d5828f1.pdfIn PDF document text
    • http://s7hmus.org/49165830335knpvy.pdfIn PDF document text
    • http://zuluwana.iblogger.org/xezebebafisabosat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455894/normal_5fe12552ac82b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425926/normal_5ff666c95a54b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zedakukabizo.epizy.com/inquisitive_sentence_fragments_answers.pdfIn PDF document text
    • http://buweweja.epizy.com/hider_in_the_house_parents_guide.pdfIn PDF document text
    • http://dowewuzosibu.epizy.com/murarev.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA51 5248 bytes
SHA-256: 7054c1071538f469352485c28d859d33d48cb1bbbd83805e09a4ab9f478b9156
font_01_sfnt_off0000dc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0F 12280 bytes
SHA-256: 53f0f3044a31b7292e55f1502675b122776612a7f7f7487d180ef353d17260e2
font_02_sfnt_off000103dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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