Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f768c93027c6f1…

MALICIOUS

PDF

68.7 KB Created: 2021-01-03 13:02:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e4e72120e72af83200a9c6b7b0b4d59d SHA-1: ae68f2c114551566284963c0c95e3c51f8d02d7b SHA-256: 64f768c93027c6f1de5fc962778deb92d4cc922d061dc0a19d45887af84772d4
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffnew.ru/aws?utm_term=angioedema+review+pdf PDF link annotation
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/4106527.pdfIn PDF document text
    • https://subafeso.weebly.com/uploads/1/3/3/9/133986831/711ff2790204268.pdfIn PDF document text
    • https://nujodobenume.weebly.com/uploads/1/3/4/4/134441993/8129421.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/56bb24b4d72.pdfIn PDF document text
    • https://buvudipugumop.weebly.com/uploads/1/3/4/8/134876529/e328fa.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/lipok-mabubibalodab-rebipafejet.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/5ef3d5d7-ccaf-4b50-8486-1ccc6058063b/solanazukenonupasij.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/85371110881.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/sccm_interview_questions_and_answers_for_experienced.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69d64516-93ea-4421-964a-3d7dde92c165/37534869255.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/o_que__bootloader_no_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/kodoporejo.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_off0000cd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD79 5292 bytes
SHA-256: 76dfed325f4a7bbca28bb7ea806f21c3b5c624963d5fd99c946b51cc06db727e
font_01_sfnt_off0000df79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF79 11508 bytes
SHA-256: cb3692386d574b0596ba504d88f45c0940c0e23268c6c0c9c924327dfb2cb1a6