Malicious PDF — malware analysis report

Static analysis result for SHA-256 5431446e2a66a2b1…

MALICIOUS

PDF

73.0 KB Created: 2020-12-08 14:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8b3ccdf67bf3c5f7c4870a2ff96e0174 SHA-1: 9d42124553b59b5bddf4d4d2b5bbb0b9a46c274b SHA-256: 5431446e2a66a2b11b6217ee1323763638e4eaf2934fb32492ab6c1bcaae8f03
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links that redirect to known malicious infrastructure and a link farm, indicating a phishing or spamming campaign. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the presence of malicious links suggests an attempt to redirect the user to a compromised site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/strik?utm_term=classical+conversations+tutor+contract+2018 In PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/9709621.pdfIn PDF document text
    • https://bufemiwod.weebly.com/uploads/1/3/4/8/134846302/digajelepenog-vijokomusewelag.pdfIn PDF document text
    • https://datugabow.weebly.com/uploads/1/3/4/7/134745554/176b70469aef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420034/normal_5fc27f106d86a.pdfIn PDF document text
    • https://bematurom.weebly.com/uploads/1/3/4/8/134886193/5768ebeb34d92cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389809/normal_5f8d9372c63fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377414/normal_5fc4b3088a944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5fb40014d1056.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/5deec80f-b8ee-474c-be9d-2daad13a574e/dht_blocking_shampoo_for_men.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f782a6b1-696c-42ee-8586-ac4b524b0265/51159073812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e8b7f8d-43f4-4ae5-a06d-b2640c779a4d/pesiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bacee87e-4cbb-4f1b-a2a2-3374207fff77/vebifag.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_off0000e24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24B 5276 bytes
SHA-256: 84c7e4193612c3e4a63bc42ff288a4b33293f9a624c2b430ad915a77b3a76a1c
font_01_sfnt_off0000f449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF449 10196 bytes
SHA-256: e947786173f2791729e2e577b44457cda884c9b434a2392c6963fd06bfa5d103

Open this report in the interactive analyzer, or submit your own file for analysis.