Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c6c07e47f81dd3…

MALICIOUS

PDF

80.2 KB Created: 2021-03-06 09:10:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: a4a433b2da5cd9e2b42ddca0e49318b8 SHA-1: 2f35dc54f5e4f1db6ea34f1b713a10d33b335485 SHA-256: c3c6c07e47f81dd360029283120110cab2ae08a9da62e6baa0dfc44d68c52787
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The document contains a mass of external links, with one prominent URL leading to `https://maypoin.ru/123?utm_term=michael+hampton+analytical+figure+drawing+pdf`, suggesting a phishing or link-farming attempt. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://maypoin.ru/123?utm_term=michael+hampton+analytical+figure+drawing+pdf PDF link annotation
    • https://cdn.sqhk.co/xinovupu/gdhegcW/66137612299.pdfIn PDF document text
    • https://xejinifinedi.weebly.com/uploads/1/3/5/3/135305438/zekufofi-luwakubotofi-bedusu-gejuruniz.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/M1DRAia/mini_battle_royale_warzone.pdfIn PDF document text
    • https://cdn.sqhk.co/wenewojufaj/ehjOFid/21801809539.pdfIn PDF document text
    • https://cdn.sqhk.co/vedukosamo/kGZhiie/lerevosijumibusaratip.pdfIn PDF document text
    • https://cdn.sqhk.co/purorelaz/gdiage0/tusamanewer.pdfIn PDF document text
    • https://cdn.sqhk.co/votiwixuduzo/hejftSQ/ludogorets_fc_table.pdfIn PDF document text
    • https://cdn.sqhk.co/pigujoxexate/hiuhhhd/slots_free_play.pdfIn PDF document text
    • https://cdn.sqhk.co/wesifarajaru/dAhfijy/castle_wars_3_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/vameduvide/QhaBvFy/zuxedumumawesixuwetixe.pdfIn PDF document text
    • https://cdn.sqhk.co/juzogimuju/91jdyib/10230550059.pdfIn PDF document text
    • https://tenivutod.weebly.com/uploads/1/3/1/0/131070705/9973105.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d4d5f35-3ca0-4605-8a70-5e6acf8edc85/physics_halliday_resnick_volume_2.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/98890706868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182393c6-8b99-49c7-95da-093653fe4cfb/msi_z77a-gd65_bios.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/424_foxfire_rd_fox_island_wa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d48179e-96e6-4489-8fbc-12711eb0cb1f/28624261976.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/brighton_and_hove_lscb_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/economist_intelligence_unit_country_report_india.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/51267575346.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_off0000e72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72C 3396 bytes
SHA-256: 48cd2ccf8786aa18716c9e7923afc2f39e0619b002d65828831227f17c260818
font_01_sfnt_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 5592 bytes
SHA-256: b9f21c600e521bd32576d56860d6a508adab2bcff3826685b9dc54d921b945f3
font_02_sfnt_off0001063e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063E 14456 bytes
SHA-256: 755b473f5c4115da4b7695797f3e49168567ab926acdaab024cb7ae9b0be8896

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