Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f3d53bac1d0b74…

MALICIOUS

PDF

76.6 KB Created: 2021-04-10 16:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9d8e277cbf66c71d1e5adc5d462d6239 SHA-1: 29b157e9efc5043c21a74106473bb214e1d5966d SHA-256: 44f3d53bac1d0b74161b2dfd031b8a23d0fbc19090a3e6d5398dd82ad68489e8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing and potentially a trojan. The document body, though heavily obfuscated, appears to be a lure related to 'tarot'. The presence of external URIs and the link farm heuristic point towards the distribution of malicious content or phishing pages.

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://gimoguvi.ru/strik?utm_term=easiest+way+to+learn+tarot+ever+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391327/normal_6023b5c409565.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365562/normal_5fe222b72b1be.pdfIn PDF document text
    • https://zubosevofugojat.weebly.com/uploads/1/3/4/3/134307347/wejizumabowowim.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lumamuguvageji_xeroxufedanume_vifaburav.pdfIn PDF document text
    • https://geduxajof.weebly.com/uploads/1/3/4/3/134328978/vudugefukom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372104/normal_5ff4a5ef00436.pdfIn PDF document text
    • https://zurobalunaxul.weebly.com/uploads/1/3/2/7/132712088/9356178.pdfIn PDF document text
    • http://gipovasota.sportsontheweb.net/sobafesakapiro.pdfIn PDF document text
    • http://gimemuwet.mypressonline.com/lisapenuvubotozula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_602c7aaad85ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449630/normal_5fc7e9d4a3305.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480161/normal_5fc5bec2a5992.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/2558462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486523/normal_5fd680d5cdf6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_6042e00cdb1d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_606b2f9c19f08.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/7835eaa0-5a82-4df0-a118-dbdc4d43b8cb/62023365746.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/sexilavatunulun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16b97fd3-8a99-457f-b0c3-46098379298b/gelex.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/wikuditudiwez.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/34519599392.pdfIn PDF document text
    • http://xukokumo.myartsonline.com/what_kind_of_film_does_a_minolta_srt_101_use.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_off0000edf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF9 5248 bytes
SHA-256: 7bf14ea622a6e0f0af7f3fd4583bc05264822ca7f005780b27a8675be5796cf5
font_01_sfnt_off00010001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10001 10816 bytes
SHA-256: f135320a987a06f3b8a7e66a324307823089fcf32e7249de37b60e019cedbbda

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