Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a513226153563b…

MALICIOUS

PDF

64.7 KB Created: 2020-12-17 17:12:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 20ee1af84223bd9787c26a56ae4726dd SHA-1: 109d17ed057820fb851862f2958bb077533136f3 SHA-256: 48a513226153563b09943970493319f8eb03b7301d5ad19353ea2b1ecc2b2b51
214 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and routes users through malicious redirector infrastructure. 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-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/strik?utm_term=betsy+ross+flag+t+shirt In PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/juzutemuzilita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456989/normal_5fa5b612415f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385427/normal_5fc5cc11ef700.pdfIn PDF document text
    • https://nobujowufovipi.weebly.com/uploads/1/3/4/6/134636268/bcfc6345f.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/8ee8abf3-dabf-4593-907f-a9cf3a3f30d8/68555815598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bdca93b-e537-4abb-baad-61cf7732f3b3/46869924390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f169af85-1e62-4f3b-85e0-3caadb23fe16/osrs_grand_tree_fairy_ring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/223dfccb-7699-443b-9bdf-12bf032f7d8e/juzosilorabozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac9b20a-82ad-4330-8eff-d296ded6d62d/tan_dapple_dachshund.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb9f2a1-849c-442c-8ab2-1dc6cbd20e39/abhiyum_naanum_song_starmusiq.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/834a71f6-89a2-4cc8-ac7d-ca0b6565197b/xapajepedeluvuxetojaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/635d3828-4011-4eca-93d6-74d715927236/5838319588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e62ad18b-22dc-418e-a63a-1b85100c6756/giduzikofalunabuw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF4 5180 bytes
SHA-256: 3db795dab38285870556583d3685109d71549db2797fe7a92343a7ce769a99bd
font_01_sfnt_off0000cd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD98 12220 bytes
SHA-256: 633a867502c3f02521f0abbe9d6a00f5c2ff1c063f9ea3e6524997c88b031e25

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