Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b694be6ac8938c5…

MALICIOUS

PDF

68.1 KB Created: 2020-12-23 05:30:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 9854b9a2121058105e5117f0ea92c64e SHA-1: 1dd4abbc88d0120447a1517facb6949025b29fcc SHA-256: 7b694be6ac8938c5dd89661ec49a23ede9829a6b9693c6290361f20c38640361
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple links pointing to redirector infrastructure, specifically `https://gettraff.ru/strik?utm_term=fight+kingdom+netflix`, which is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to "Fight kingdom netflix". The presence of numerous PDF links and a malicious redirector indicates an attempt to lead the user to potentially harmful content, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/strik?utm_term=fight+kingdom+netflix In PDF document text
    • https://cdn-cms.f-static.net/uploads/4427526/normal_5f9cf6334f209.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_5fa9d3ac1d8aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f886174eb82b.pdfIn PDF document text
    • https://vemudafu.weebly.com/uploads/1/3/4/6/134655664/wekutakadu-dafufuf-pivitatod.pdfIn PDF document text
    • https://zisinifaja.weebly.com/uploads/1/3/4/5/134599776/31c77b9b7a7cc.pdfIn PDF document text
    • https://luxapojago.weebly.com/uploads/1/3/4/3/134327771/vuvob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490380/normal_5fab377137012.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5fb4317e7093d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc1138816f6d44b07bfcb5c/t/5fc15ea13f75b16643079bd0/1606508193925/54382710739.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/81930502694.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC317 4712 bytes
SHA-256: 37925af3fdd560d4ecbfef6cc104ffea47ac99c714c228bacd8fdd99e73b5d73
font_01_sfnt_off0000d2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F8 10468 bytes
SHA-256: 10065b01de3fd7c3ca1cf6bf67addddc3447b807e90b3e790a0854fcc260fd8e
font_02_sfnt_off0000f62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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