Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a05f8bf9d3123be…

MALICIOUS

PDF

103.1 KB Created: 2021-03-21 22:53:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 015bd6a07c59770c4027367977dbf2e6 SHA-1: eda1c8afd9a4fe82c0d7980f15a45e179710009c SHA-256: 7a05f8bf9d3123be38eefc617f89888fba8751b93c4b83ff4797a057e269f8b4
126 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The embedded URL `https://jacksth.ru/wix?keyword=siemens+milltronics+multiranger+plus+manual` suggests a lure to trick users into downloading or viewing content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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/wix?keyword=siemens+milltronics+multiranger+plus+manual PDF link annotation
    • https://cdn.sqhk.co/lolajelor/YFid7yz/kiraw.pdfIn PDF document text
    • https://cdn.sqhk.co/xexerekija/jihhbii/najepolaniwojobom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458417/normal_600c61806332c.pdfIn PDF document text
    • https://cdn.sqhk.co/posibovifiw/Qgghfgi/bajudi.pdfIn PDF document text
    • http://fionainthefield.org/83417074053wniej.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/e8idWii/kalogefosoxuwejabizeres.pdfIn PDF document text
    • https://musazowoxagaw.weebly.com/uploads/1/3/4/3/134323980/dolupiwin_nasiwera_nomidubefi.pdfIn PDF document text
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/bfaadeab933.pdfIn PDF document text
    • http://biomanua.website/30103864983yf4x8.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/531427701749ie6j.pdfIn PDF document text
    • https://jotutavujisab.weebly.com/uploads/1/3/1/1/131164129/kewazo-xodipuxifi-naxuguv-viwibodamalu.pdfIn PDF document text
    • https://dujililapute.weebly.com/uploads/1/3/5/3/135347223/4757065.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/H9gg8jf/loligunepunazipobufizovez.pdfIn PDF document text
    • http://pipvip.ru/games_that_can_be_played_on_acer_aspire_e15i22bp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421461/normal_5fc91e0e23dce.pdfIn PDF document text
    • https://degusatujetuz.weebly.com/uploads/1/3/0/8/130813325/zogezanetub.pdfIn PDF document text
    • http://trikotoria.ru/137550018491hpcc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_478160dde6414d19ba50839143619f67.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxegeza/pt_sans_caption_font.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/install_apk_from_adb_mac.pdfIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_aa7aedf3a9a349ce8f59647afddf1de2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusixa/romantic_thriller_book_series.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/autotune_vst_audacity.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14268 5236 bytes
SHA-256: d3abf2c5fddd83553a107c84c93d9d00c9a057ab447cce5691dc3b5f8ed9ef41
font_01_sfnt_off00015414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15414 12524 bytes
SHA-256: 25e85d6460d5b942a149c92f90852e811b4d521be9a01db44a55d882833647f6
font_02_sfnt_off00017e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E6B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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