Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc06a781b46b9f8…

MALICIOUS

PDF

84.5 KB Created: 2021-03-23 00:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 592cedbdc87e4cc702e903b635544097 SHA-1: 63430db1bdde6bf69ded7056af7ebe391d43b922 SHA-256: dfc06a781b46b9f8c6ba08f8ab0bbfad4b4ee9854e1b3cd4db00ce75479afed1
134 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and embedded links, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body, though truncated, indicates a "free download" pretext for "strategic management text and cases pdf". No scripts were extracted, but the overall structure and heuristic firings strongly indicate a phishing attempt designed to lead users to malicious content.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/wix?keyword=strategic+management+text+and+cases+pdf+free+download PDF link annotation
    • http://mujoxoluvisukid.getenjoyment.net/doro_flip_phone_battery_replacement.pdfIn PDF document text
    • https://zabagazepag.weebly.com/uploads/1/3/4/4/134498959/wokeb.pdfIn PDF document text
    • http://itclick.pro/255991499200r4t9.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/36161316940.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/jfxLgiF/tazejitiwudebesaxofe.pdfIn PDF document text
    • http://blankid.ru/alarma_prestige_aps997el5t3i.pdfIn PDF document text
    • http://esagafow.fun/12021963520pubkh.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/gir8ujj/que_toman_in_english.pdfIn PDF document text
    • http://dokukuke.mypressonline.com/75191711342.pdfIn PDF document text
    • https://cdn.sqhk.co/riraxizilob/hcvighb/autocad_2d_to_3d_converter_free.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirijobadi/plaxjhb/wafejowafowebifiw.pdfIn PDF document text
    • http://sekelenogake.getenjoyment.net/reviews_2019_lexus_nx_300.pdfIn PDF document text
    • https://ranilabat.weebly.com/uploads/1/3/5/9/135999147/fekusigabajilo.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/the_girl_who_fell_from_the_sky_summary.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/56492225263.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
    • http://nakixaxev.myartsonline.com/dozusew.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/91889332378.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/abscess_formation_in_lungs.pdfIn PDF document text
    • http://limoxukuk.atwebpages.com/which_is_better_panasonic_or_att_cordless_phones.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_off0000ff98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF98 5528 bytes
SHA-256: 980ee4edb1b88e91f701213eadc38e4902b0590ae1d4fef05de9f9279cf9a577
font_01_sfnt_off00011259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11259 10572 bytes
SHA-256: 3e434d97bcd5eeec46b3205fec3c457fe77832bf17f1415cc9c6f280787f8b93
font_02_sfnt_off00013662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13662 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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