Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48f96eb9c2e162c…

MALICIOUS

PDF

66.3 KB Created: 2020-11-13 15:41:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bcb2c04115a131006757ecd809aede8b SHA-1: 38d46f85aed6213d4e555c9738a9a86e8bbe1991 SHA-256: b48f96eb9c2e162c960b11d6da60f9c369271ff7360ee5421623078c247aae0e
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains keywords related to 'hack' and 'mod apk', reinforcing the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/aws?utm_term=boom+beach+hack+mod+apk+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388627/normal_5f9a82b32ff39.pdfIn PDF document text
    • https://janokapaw.weebly.com/uploads/1/3/4/3/134329878/larizorulozo.pdfIn PDF document text
    • https://fuwozubasuzej.weebly.com/uploads/1/3/4/4/134473550/9543570.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368479/normal_5f902dfb32ed1.pdfIn PDF document text
    • https://walotowujiko.weebly.com/uploads/1/3/4/5/134582573/pezufu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413570/normal_5fad29871919c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379483/normal_5fa1de387fc1c.pdfIn PDF document text
    • https://deronabopopunol.weebly.com/uploads/1/3/4/7/134728657/tuxinelum.pdfIn PDF document text
    • https://niraniki.weebly.com/uploads/1/3/4/6/134662237/a027c1b2fef.pdfIn PDF document text
    • https://sijazeresivex.weebly.com/uploads/1/3/4/5/134502522/vudomofiw.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/3b076f98-f3b7-46f9-b5d9-873b3fc3b0a4/fe_review_manual_lindeburg_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc1b520f-f568-42ab-ab46-54f2989e4b1a/wegekamigojevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d4789ab-4c73-480b-8048-52ce46e3d37a/65750116352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e4ce90-37af-41bd-b71f-c2854902a96d/kilafotasenujinosemiwez.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_off0000c665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC665 5356 bytes
SHA-256: bc259725fd8611edc39d36baf17d3fefcc77e0ddce587fd508305a4e2e763c10
font_01_sfnt_off0000d86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86A 10668 bytes
SHA-256: 4910e248d0ac11c8a5a9476eae3dfa101e78d181ea0637a1618be9da405421da

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