Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd52f2c7a834a93…

MALICIOUS

PDF

89.3 KB Created: 2021-03-31 04:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f8913782eb9d6e4bf906de90469dec15 SHA-1: 113fb358b2fc2572751145e227880baba7b40ece SHA-256: dfd52f2c7a834a9326842625cfa1d37a0da4414deccecd2c822540e8e60c01b0
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spamming operation. The document body text, though heavily obfuscated, contains keywords related to search queries, reinforcing the lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/award?keyword=bestiario+2+pathfinder+pdf PDF link annotation
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/winawelixaliza.pdfIn PDF document text
    • https://pasojifet.weebly.com/uploads/1/3/0/7/130776368/zinerixez_gubex_vewumunagezazos.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/hhcJ5jj/walking_dead_comic_finale_spoilers.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/mjibgia/mozujakalajamidiwiregu.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/jhhUzgj/gisimukaxukifo.pdfIn PDF document text
    • https://cdn.sqhk.co/gewewoturila/iizgcxQ/bemanupepig.pdfIn PDF document text
    • https://cdn.sqhk.co/pudinivil/iggguhh/insomnia_movie_free_hd.pdfIn PDF document text
    • http://pagexanomala.22web.org/jean_gaboriau_guide.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/ritifufobemavipedek.pdfIn PDF document text
    • https://fusesekomufe.weebly.com/uploads/1/3/1/6/131606177/6642475.pdfIn PDF document text
    • http://tubesebove.medianewsonline.com/55081327047.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/piparogadefomoziwazolola.pdfIn PDF document text
    • http://numulul.mygamesonline.org/65438396196.pdfIn PDF document text
    • http://xamojopilupivo.scienceontheweb.net/vexukisafajodez.pdfIn PDF document text
    • https://cdn.sqhk.co/ketegobuto/dgfvhi4/workplace_emergency_contact_list_template.pdfIn PDF document text
    • https://remenogabeta.weebly.com/uploads/1/3/4/0/134012297/tugajudemomajagotur.pdfIn PDF document text
    • https://tatefazaseg.weebly.com/uploads/1/3/4/0/134016926/8096333.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/bebubitozij.pdfIn PDF document text
    • http://fewepenemowa.epizy.com/war_of_the_worlds_2019_trailer_fox.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/18638701529.pdfIn PDF document text
    • http://lunijikujapike.epizy.com/chromedriver_selenium_for_linux.pdfIn PDF document text
    • http://pilidiju.rf.gd/91345286816.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/homecine_apk_full.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/80839901319.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/child_support_information_sheet.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_off00011d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D63 5280 bytes
SHA-256: eef2baa38642018c0defb4ec457680d3482dcfff77f78d88066206590c11c322
font_01_sfnt_off00012f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F54 11864 bytes
SHA-256: 600830769c63678c6eaf82dae279b5accd243335930f6edd54ef35b8653958b5

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