Malicious PDF — malware analysis report

Static analysis result for SHA-256 781864957a453e56…

MALICIOUS

PDF

67.5 KB Created: 2021-02-04 09:17:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d0d2e80b4d8b217add24aa03a1706a35 SHA-1: 0117bd94e4f6bc3306afdaedc770e635b991b4d2 SHA-256: 781864957a453e56db33a90974a5d7c1e51ebfd9b7dce1969330aab8398de1ff
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-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://leonvi.ru/aws?utm_term=chevrolet+cruze+2012+service+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378846/normal_5ffcc721a4286.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426688/normal_5fca54cd1f1d8.pdfIn PDF document text
    • https://talupujepanuzan.weebly.com/uploads/1/3/4/5/134595677/9751918.pdfIn PDF document text
    • https://rofovotojoroko.weebly.com/uploads/1/3/4/8/134878837/22b6b4d70.pdfIn PDF document text
    • https://bakasilamor.weebly.com/uploads/1/3/1/4/131407315/rikelaxova.pdfIn PDF document text
    • http://arenda-comp.space/5187793524ye03k.pdfIn PDF document text
    • http://electriccannoz.club/48972553788lvgh.pdfIn PDF document text
    • http://auto-fishing-rods1.club/hacking_wireless_networks_for_dummies_espaolxniwv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/67964774098.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/unit_angle_relationships_homework_4_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/beaded_lizard_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/maths_riddles_with_answers_for_class_1.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/eia_refinery_capacity_report.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_off0000cd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0E 5380 bytes
SHA-256: ec7125d2e3ed3ec948b6d8ee74627578570eec9341ff6e7faefa316c755fbcae
font_01_sfnt_off0000df38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF38 10092 bytes
SHA-256: df763715d25deed4687b92a49193e02050bc7ebe5a3b0f975dce6f1096abffe1