Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97d4dc82a9d778b…

MALICIOUS

PDF

77.1 KB Created: 2021-03-10 12:19:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d7d26d27d6876ac0d8ff11a5841013a0 SHA-1: a5a17c8a1f72b4287ca6b3d63cc8db5554ab3642 SHA-256: d97d4dc82a9d778b628e0438b79c2410ba3be437bd8e87a445e009fb7810bb60
126 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 embedded URLs, many of which point to disposable domains and are likely used for phishing or to host further malicious content. The document body, though heavily obfuscated, suggests a lure related to academic transcripts, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/award?keyword=academic+transcript+sample+pdf PDF link annotation
    • http://enots.space/batedeira_planetria_perform_inox_oster_resenhazv6xp.pdfIn PDF document text
    • http://braco.ru/duvanixesisivaqu9bd.pdfIn PDF document text
    • http://csxmoney.info/juwidegadurerapexipijojoq2sqe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413473/normal_6020bdc01e75a.pdfIn PDF document text
    • https://finukapaxareb.weebly.com/uploads/1/3/4/4/134494590/c1839c5.pdfIn PDF document text
    • https://mufabevazom.weebly.com/uploads/1/3/1/3/131382955/2989410.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425484/normal_5ff0e140107e9.pdfIn PDF document text
    • http://gevixadita.22web.org/68463148763.pdfIn PDF document text
    • http://brettlockhart.com/college_algebra_formulas_cheat_sheet5tsta.pdfIn PDF document text
    • http://p-kavkaza.ru/tesis_planeacion_estrategica_de_una_empresa_constructorao7o1w.pdfIn PDF document text
    • http://hookup682.site/how_to_sell_bitcoin_on_cash_app_2020586l8.pdfIn PDF document text
    • http://shoop-fm.ru/tone_generator_app_android4ncgi.pdfIn PDF document text
    • https://nemapawa.weebly.com/uploads/1/3/0/9/130969411/2009634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478667/normal_5fefded1156bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475376/normal_5ff86b349312b.pdfIn PDF document text
    • https://zitolibozix.weebly.com/uploads/1/3/4/0/134040523/3f8db11e6f7.pdfIn PDF document text
    • http://pl50off.info/97089228515lgi4b.pdfIn PDF document text
    • https://fefirewaw.weebly.com/uploads/1/3/0/7/130775199/1779641.pdfIn PDF document text
    • http://casserlabs.xyz/bunuxazigepibovubrze2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://solobasoridevel.epizy.com/10096719543.pdfIn PDF document text
    • http://xosekube.epizy.com/boonie_planet_hack_apk.pdfIn PDF document text
    • http://mulexotuvatago.epizy.com/invite_card_template_free.pdfIn PDF document text
    • http://gajovab.epizy.com/nibuluge.pdfIn PDF document text
    • http://xelaful.epizy.com/dinosaur_arm_training.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_off0000f201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF201 5288 bytes
SHA-256: 363c7d6ef8f7251fcb579f6ffc452d9a31e00d982038fa59b8243abe12c69239
font_01_sfnt_off000103e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E7 10304 bytes
SHA-256: 005fc22d871a9b7622fd0a0d69a572e8997b9b5feecb91259d82ca4c4a180ba8

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