Malicious PDF — malware analysis report

Static analysis result for SHA-256 9199c223d2001e88…

MALICIOUS

PDF

73.6 KB Created: 2020-12-26 05:16:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f53fc6d1fd398335a1d89ff5732d075b SHA-1: d685acff413a5a5b1f09cd084ac78b3aff5391fb SHA-256: 9199c223d2001e88bec5a62a54bb41a2b72dc96938a42f2f7b708e25bdaee44b
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, one of which is associated with a search term for 'minecraft pocket edition games on computer'. The presence of embedded URLs and the heuristic firings suggest this document is designed to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=minecraft+pocket+edition+games+on+computer PDF link annotation
    • https://zotadapavera.weebly.com/uploads/1/3/4/4/134483721/zugusazemoz_jalapobuxigopub_wulideveref.pdfIn PDF document text
    • https://miwejezapelo.weebly.com/uploads/1/3/4/3/134342363/9a6c5.pdfIn PDF document text
    • https://cdn.sqhk.co/sozovifena/xhaCMhh/95619746723.pdfIn PDF document text
    • https://cdn.sqhk.co/donewipimep/U0yI2gj/bulumij.pdfIn PDF document text
    • https://kazanuwe.weebly.com/uploads/1/3/2/6/132683097/3860829.pdfIn PDF document text
    • https://tuzibexidove.weebly.com/uploads/1/3/4/8/134852131/gigerenu.pdfIn PDF document text
    • https://giwedogifuj.weebly.com/uploads/1/3/4/7/134741463/999669.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374536/normal_5fcb17bd6f721.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451023/normal_5fe3d959279a1.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/kewuxejikiwe/40962325295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d88bb126-967b-4b5a-b529-73856e1d4966/monster_hunter_stories_qr_code_list.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_off0000e10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10F 5512 bytes
SHA-256: 006f503812eed34d451906cdfd1eb87de8f3b46cb190876cc8d064a0c6e66e25
font_01_sfnt_off0000f3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CB 10956 bytes
SHA-256: bf8df2c9d394348fcc03227ae334e9516e0588cf7663375350a6bf8a946f7952

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