Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a9c974c018359e1…

MALICIOUS

PDF

41.5 KB Created: 2020-10-03 21:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c4954d598abcdfb2a5b2f49623f24a9d SHA-1: be169d7b479c1fa5010cbce97061fc29cd64e82b SHA-256: 7a9c974c018359e1249e176c39a6db5a8b91dc435bc6d0c36675b20e1bf14c1f
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, likely to deliver a payload or phish for credentials. The document body and embedded links suggest a lure related to software cracks, a common social engineering tactic. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=auto+tune+8.+1+crack+free In PDF document text
    • http://files.clarysageconsulting.com/uploads/1/3/1/6/131606056/8c8ed.pdfIn PDF document text
    • http://files.sustainablehealthandwell-being.com/uploads/1/3/0/8/130813466/jubumedaneni_wesukom.pdfIn PDF document text
    • http://zigovas.rush4kids.com/uploads/1/3/1/3/131383314/9281aa.pdfIn PDF document text
    • https://site-1037224.mozfiles.com/files/1037224/54392528456.pdfIn PDF document text
    • https://site-1040132.mozfiles.com/files/1040132/kamukokokotiviziw.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/6846861c-4d2f-4e4b-bbf3-1cc3037829f8/25202183954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d77fee21-1164-4055-8230-dc9e024c769b/68350944782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fd85827-88d7-44e3-833b-281e7378ba85/paworurirudesuzoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82dea7b6-c333-4972-a2e1-9ff1e4aec442/4103141787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1eefaa4-7a34-4dbb-857d-cd7d3c02a0a6/49399379879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8170ff2c-8ea2-4b4a-9641-bf5c6f26b2a8/77492442455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d822998-6153-44bc-992c-f85624fa1b6d/digovewiporagu.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_off0000641e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641E 4996 bytes
SHA-256: 8ff3b922b80b0802dd761079c3504bdfee4c335866fefac2007ca737bf46a0d6
font_01_sfnt_off00007546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7546 10700 bytes
SHA-256: b314f8fad470844b83d3ef4c6723af64b996d7e7bb70e0099c341f56ed3d6216

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