Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ba82a144ba8042…

MALICIOUS

PDF

66.4 KB Created: 2020-12-16 17:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f15787d3f75b3ba904ea28d484685e15 SHA-1: e0ddab04d6ef83b0c4a5a8e5ac075c913c3a75e9 SHA-256: 95ba82a144ba80420475d958463f42614118d9fec843655b06350d58412c191e
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The ClamAV detection and ML classifier further support its malicious nature. The primary attack vector appears to be directing users to external malicious sites, likely for phishing or to download further payloads.

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
  • 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://traffmen.ru/123?utm_term=st+joseph+massillon+ohio+bulletin In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417414/normal_5fa2e13034cc3.pdfIn PDF document text
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/putananajubumifiguva.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/0865f405a402eda.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/sefiwegegagu/gefabutixujutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9088cd76-63a5-4382-8211-201e7d103424/montgomery_ward_catalog_1895.pdfIn PDF document text
    • https://s3.amazonaws.com/fulomufimikim/placebo_lyrics_devin_dawson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d3ed7e4-92b0-426a-bb4a-3b5e3317126e/49743926720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/374ad893-9464-4946-bcfe-b8ab075573a9/magnetic_hydrant_wrench.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c46333f7-53dd-4f9f-88e0-1348d5510d07/la_flatiere_retraite_prix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7bb541-69ab-48a0-a453-9bd13bbe6831/53587047817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ef1da5-f57b-47fd-bfae-8f6d04f2f172/33860590881.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a87eca1-4fd4-4d54-85d0-5892d5712c2e/14652346634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4b5c1b-552d-44f4-b983-8853f4d0f520/45339659882.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_off0000c65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65B 5284 bytes
SHA-256: 88886faffaaf47711f1cc1d736e13bb01ae61b2b83121ae6932b52933af22889
font_01_sfnt_off0000d82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82A 10716 bytes
SHA-256: e5da7442e20f86cc7b0c62101c6925315287f5bcf898a2979992995143acab72