Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ed234043bce516…

MALICIOUS

PDF

74.0 KB Created: 2021-03-23 00:31:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 495a82816167085fb03a5ee5802ee76d SHA-1: 96b6b929e9ab913c54e85677c566694267de7b28 SHA-256: b0ed234043bce51656a6519a86d2cbf0165492dbf6b8302923d9fa089af2b227
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm. The primary URL, 'https://resalured.ru/strik?utm_term=how+to+start+a+coleman+powermate+5000+maxa+er+plus', suggests a lure to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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 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://resalured.ru/strik?utm_term=how+to+start+a+coleman+powermate+5000+maxa+er+plus
    • https://cdn.sqhk.co/pefisemise/hdfjehh/dumb_ways_jr_boffo_s_breakfast_free.pdf
    • https://totupima.weebly.com/uploads/1/3/1/4/131438580/c84a9e12.pdf
    • https://cdn.sqhk.co/gajamomol/hhwjjcn/40881461716.pdf
    • https://xavodumofas.weebly.com/uploads/1/3/4/9/134901052/ef13d1c.pdf
    • https://fofomobagukewe.weebly.com/uploads/1/3/4/3/134352826/bidorugerow_xoxekak_debikasikebuda.pdf
    • https://basalolevezuw.weebly.com/uploads/1/3/1/6/131606508/4266196.pdf
    • https://sowekunozo.weebly.com/uploads/1/3/5/3/135321923/6364260.pdf
    • https://cdn.sqhk.co/faserekino/8ibVYii/padex.pdf
    • https://cdn.sqhk.co/luwesefizi/0ibciiM/84316142129.pdf
    • https://xulozajewe.weebly.com/uploads/1/3/1/3/131384688/mofumopapod.pdf
    • https://kekidebas.weebly.com/uploads/1/3/4/6/134633427/ledidu.pdf
    • https://cdn.sqhk.co/diwiporeb/taHYggG/64227196001.pdf
    • https://jojiwunu.weebly.com/uploads/1/3/5/3/135387754/lufosiro_nidesidufe_suzirek.pdf
    • https://nukarefu.weebly.com/uploads/1/3/4/1/134131348/5405717.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_093751984e1e4ce6acc294e445188f99.pdf?index=true
    • https://s3.amazonaws.com/webipejonavuv/biblia_ortodoxa_etiope_en_espaol.pdf
    • https://0978d23c-7b87-408a-b4ab-ff16da0dae51.filesusr.com/ugd/369d68_7d2c98d477ac46d68865d7ae531da1ac.pdf?index=true
    • https://s3.amazonaws.com/bupesejirijejus/26451045092.pdf
    • https://s3.amazonaws.com/mujesogi/calculus_2_solved_problems.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d341.bin
52ad930d0e880be1e1bedd1ca4005dfcfca8a3fd748f2bfb8cf51f1a07b32d0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD341 5300 bytes
font_01_sfnt_off0000e53c.bin
ba3a05972828aa3ba62bc2585a02c5a68ec991cf485d0a4d288034a21119ac97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE53C 11240 bytes
font_02_sfnt_off00010a6e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6E 4324 bytes

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