Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d64051c4739197…

MALICIOUS

PDF

70.6 KB Created: 2021-02-21 07:11:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9264f6036f98144bfa8cc2b680de38a5 SHA-1: 40448a53c84041542cca287b7d0275bb6ff2c7dc SHA-256: 01d64051c47391970f79d4df34c74e5d1cd250148bea45186c37c51136fb8d7d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one suspicious URL pointing to jottigo.ru. ClamAV and ML classifiers also flagged the file as malicious, specifically as a phishing trojan. The presence of embedded URLs and the link farm structure suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

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://jottigo.ru/123?utm_term=not+my+cup+of+tea+meaning+and+sentence PDF link annotation
    • https://cdn.sqhk.co/bezakebijuk/eiagfhl/33126632323.pdfIn PDF document text
    • http://particulieres-societegenerale.best/tipos_de_radicales_libreskb775.pdfIn PDF document text
    • https://cdn.sqhk.co/savimatuv/gjB4Eif/chocolate_bundt_cake_with_raspberry_jam_filling.pdfIn PDF document text
    • https://cdn.sqhk.co/faruzikako/SnrhbWY/gefub.pdfIn PDF document text
    • https://xatiletovolut.weebly.com/uploads/1/3/1/4/131409128/mukatugesuvodu.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/r0igAuT/bloody_monsters_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/renonidofel/hhidT0Q/beat_the_boss_4_weapons.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/9hggeqR/gixidejuvirorofetobere.pdfIn PDF document text
    • https://kavekoda.weebly.com/uploads/1/3/5/3/135326791/wuviluzigomewe-kaxokewixovu-jitabuked-pazegaxuvilop.pdfIn PDF document text
    • http://svoylend.xyz/best_town_hall_9_attack_strategyf0vz2.pdfIn PDF document text
    • http://usecabinets.xyz/nizunewizagalivogowtwe.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/0avW2um/19513864885.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/jikGgee/cake_decorating_supplies_michaels.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/buwosevax/bhoot_fm_2016_episode.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/8016123604.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/nabanafog.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/answer_key_nts_mbbs_2019.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_off0000d712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD712 5416 bytes
SHA-256: d9bfd06395648d60a295c3ed89cf5c575aca2a3f6a82444a19b516363056753d
font_01_sfnt_off0000e98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98B 10576 bytes
SHA-256: b58a7f7cc9854df7db10762e7905e6b4727335ac9bc5fbb87a839430d9a3e674

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