Malicious PDF — malware analysis report

Static analysis result for SHA-256 7afa11afce6232bf…

MALICIOUS

PDF

81.0 KB Created: 2021-06-14 14:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f24b963b595684a8b182bb8e9dcdefb5 SHA-1: 048307e836f1c52c5e0a444ede03cacfcbc236f8 SHA-256: 7afa11afce6232bf95d14d69fbb7028e697c42e08ae024aa2d39a556532f87ef
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF document flagged by ClamAV as a phishing trojan. It contains multiple external URIs, one of which, 'https://queure.ru/pbw?utm_term=logo+esport+maker+premium+mod+apk', is likely part of a phishing lure. The heuristic 'SE_DOWNLOAD_BUTTON' suggests a call-to-action, reinforcing the phishing attempt.

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://queure.ru/pbw?utm_term=logo+esport+maker+premium+mod+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370080/normal_6019b54210830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484122/normal_605efa7679e72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408321/normal_603b5510dc114.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482023/normal_5fdd96ab1174b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422135/normal_60bd1f7b90f66.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pijipusap.pbworks.com/w/file/fetch/144714615/85093007782.pdfIn PDF document text
    • http://runaliguredu.pbworks.com/w/file/fetch/144456081/levy_county_mugshots_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a676b3c-0ecb-41fa-9a6a-c0cb36690c5d/canon_pixma_mx432_change_ink_cartridge.pdfIn PDF document text
    • http://duziruromeja.pbworks.com/w/file/fetch/144490200/60624538162.pdfIn PDF document text
    • http://gulisapil.pbworks.com/f/feebas_guide_platinum.pdfIn PDF document text
    • http://fekofowipuze.pbworks.com/w/file/fetch/145275609/tegonilus.pdfIn PDF document text
    • http://muxopal.pbworks.com/f/45034770793.pdfIn PDF document text
    • http://fudotedafeji.pbworks.com/f/rusuvaremuvomoretepebelov.pdfIn PDF document text
    • http://xuvabufoj.pbworks.com/f/arlequim_servidor_de_dois_amos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/345fe0f7-ac49-4a4f-a393-07a560566a42/the_landlady_questions_and_answers_commonlit.pdfIn PDF document text
    • http://xovakovawup.pbworks.com/f/laduxudamopemizotas.pdfIn PDF document text
    • http://fevosezew.pbworks.com/w/file/fetch/145268100/pumonamepuxibu.pdfIn PDF document text
    • http://beratirupo.pbworks.com/w/file/fetch/144511950/yamaha_motif_xf_manuale_italiano.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_off0001009a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009A 5252 bytes
SHA-256: 1469179f19f4692eb30c514c828629b14d67faca68584b32af0c96e5b98a6f89
font_01_sfnt_off00011267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11267 10732 bytes
SHA-256: 93991e2b739e602d8bf637773f915776df3bae50e16231b2b1656e643098aee4

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