Malicious PDF — malware analysis report

Static analysis result for SHA-256 624ec441a101379a…

MALICIOUS

PDF

73.4 KB Created: 2020-12-27 14:39:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8ea9bfd013e1e5e4debd06931d6f4b0e SHA-1: d214ae339296b5d706ce3000c67831c0fc1a05af SHA-256: 624ec441a101379a783b69634fe42f19fc21a21bcd6b64f04919cb17b0baf19b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL pointing to 'trafftec.ru'. This heuristic, combined with a high ML classifier score and ClamAV detection, strongly suggests a malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, contains keywords related to 'Pokemon card for sale ebay', indicating a potential lure.

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
  • 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://trafftec.ru/strik?utm_term=pokemon+card+for+sale+ebay PDF link annotation
    • https://cdn.sqhk.co/minamojazi/Khhgfgj/halloween_costume_ideas_2020_couples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488102/normal_5fe6b3df23f8a.pdfIn PDF document text
    • https://gilaxisob.weebly.com/uploads/1/3/1/4/131406303/mopizugilujavizo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382771/normal_5fdcf06603b0c.pdfIn PDF document text
    • https://fofosaja.weebly.com/uploads/1/3/4/2/134234592/zogemalixe.pdfIn PDF document text
    • https://cdn.sqhk.co/zoturisa/ahgjbyV/2419905257.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/jokotaziweluge/27485885719.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/historia_de_la_tabla_periodica_moderna.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/moffat_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/unblocked_games_potty_racers_5.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/dutasinure.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/ff14_alchemy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a94ddee4-ee1b-4581-8f86-a33bde751920/aegis_x_kit_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/321cffbd-598d-44d5-9905-c0e6efbdfcd3/amor_loco_nunca_muere_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/gifted_imdb_parents_guide.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_off0000e046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE046 5472 bytes
SHA-256: 46819fa1b9c59c02bb539caa2d04fefa1eeb9fa3881088dcf415916f7459146c
font_01_sfnt_off0000f2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D9 11124 bytes
SHA-256: 82083e2bb4f5c0fd16860a36e76116e5981be97d17f60d381c5b886a6b47531d

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