Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ff16d3db5ae8a4…

MALICIOUS

PDF

71.4 KB Created: 2021-03-27 17:37:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e01c0d56f3b3e25a44427721edf025f5 SHA-1: 22ea5ce643a411d69094a43c0ca67f387293dad3 SHA-256: 07ff16d3db5ae8a4061f16e6a4368294f55b1968974c70f5685935863f859a7a
126 Risk Score

Malware Insights

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

The PDF contains multiple external links, with one specifically mentioning 'changement batterie dyson dc35' and pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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://jacksth.ru/strik?utm_term=changement+batterie+dyson+dc35
    • http://milesnires.xyz/how_to_make_someone_fall_in_love_with_you_by_walter_j_bower_freeqpsjj.pdf
    • https://birugenok.weebly.com/uploads/1/3/4/6/134632973/tolejogolura.pdf
    • http://mikomizub.iblogger.org/toefl_test_papers.pdf
    • https://boxomuti.weebly.com/uploads/1/3/4/0/134016719/relavak-panajisom-tovelubo-vajusexo.pdf
    • http://vadanunagirira.getenjoyment.net/depovoje.pdf
    • https://cdn-cms.f-static.net/uploads/4373797/normal_601197fb5d372.pdf
    • https://nosovaranipad.weebly.com/uploads/1/3/4/7/134743093/poziveki.pdf
    • http://joberorerorepi.iblogger.org/honda_cbx_750_f_manual.pdf
    • http://wipababotuzuke.iblogger.org/teganaw.pdf
    • http://gobitujesan.scienceontheweb.net/21379030344.pdf
    • https://static.s123-cdn-static.com/uploads/4462694/normal_5fccf89a5f6a1.pdf
    • https://lefatelaxebaj.weebly.com/uploads/1/3/5/3/135398996/9832592.pdf
    • http://trenolgia.buzz/rifavarorarijitsg0q6.pdf
    • http://carbags.site/8137682774p3rlm.pdf
    • https://nobenore.weebly.com/uploads/1/3/2/6/132696051/zuloxaxedavigiku.pdf
    • https://cdn-cms.f-static.net/uploads/4454167/normal_604b2203a7a1e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/4f0fc788-0ce2-4bcc-9696-4747425e2fb0/33450850971.pdf
    • https://uploads.strikinglycdn.com/files/1964f287-4520-4b6f-82dd-84c6fb5cc9b6/11702901137.pdf
    • https://uploads.strikinglycdn.com/files/4d5527b9-49ab-42fa-a25f-b0d30b832969/95333208950.pdf
    • http://fivajopafovile.rf.gd/despicable_me_script.pdf
    • https://uploads.strikinglycdn.com/files/2985dc12-302f-4e04-8481-40251fd4e448/solubility_problems_chemistry.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_off0000c860.bin
cf9b116936d13c074af14ec75af3a55760dab24e729b3d661b8c3cc59e3ae0d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC860 5664 bytes
font_01_sfnt_off0000db7a.bin
55fe5d0f1a078aeb14e3545adf31a53c5ce8fa92eb8f28c424e1ef916373963a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7A 11424 bytes
font_02_sfnt_off00010064.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10064 4324 bytes

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