Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa924e0768c9484…

MALICIOUS

PDF

71.4 KB Created: 2021-02-17 16:07:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a96a0037504a88d629d41a1e1a58c97a SHA-1: 0f6fdd407e9cb7e78e1bd7f4745965836a00ded2 SHA-256: 9aa924e0768c94843c3b0a2a374475b1efbb07b8022e86bd1eb62a3bb377b526
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=difference+between+software+developers+and+software+engineers In PDF document text
    • https://kusijavi.weebly.com/uploads/1/3/4/3/134385668/7348190.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481841/normal_5fd2c1b5823b3.pdfIn PDF document text
    • https://cdn.sqhk.co/metusoteliza/iagiQge/17173185189.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/ifgcLM1/zombies_run_app_store.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/DTghhe8/nurebezemesibidilofebogar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446035/normal_6024a03ed4377.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/hhnhahc/white_wooden_tripod_floor_lamp.pdfIn PDF document text
    • http://zofapojofiwifi.iblogger.org/kazepalusomob.pdfIn PDF document text
    • https://pirovosarelivo.weebly.com/uploads/1/3/1/4/131406751/1aabba17782f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vugikalijuboxo.epizy.com/lease_agreement_addendum.pdfIn PDF document text
    • http://zudosikewemer.epizy.com/cruise_travel_packing_list_template.pdfIn PDF document text
    • http://rasuvum.rf.gd/bumedilofukebigipikodoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/7878420404.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/final_fantasy_8_ps4_trophy_guide.pdfIn PDF document text
    • http://tonunipuwe.rf.gd/56794454966.pdfIn PDF document text
    • http://zenejifawulo.epizy.com/clackamas_county_courthouse_forms.pdfIn PDF document text
    • http://zezevefo.rf.gd/nakizurevilobu.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/fur_elise_short_version_sheet_music.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_off0000d7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EE 5616 bytes
SHA-256: 9fce13869c60801f2386be727934ca17cba55f4dcbda626f682a0dabe924f28b
font_01_sfnt_off0000eb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB37 10800 bytes
SHA-256: 67304281fd70e333a721f2e98c85f3846d3f92d53c21b1e36a9e29a865a94db8

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