Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9abf8d9052137b…

MALICIOUS

PDF

71.5 KB Created: 2021-04-01 15:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 77b343c4e99d6fea144de492472fe18b SHA-1: 084304d5e2ee22e9afe65642ed809a654c4d15e5 SHA-256: 6e9abf8d9052137b96f7ad13600eb27f39d22de64d177c108e055bf9dc072435
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded URLs that point to suspicious domains, suggesting it is used as a lure to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains keywords related to textbooks, aligning with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://mezovuduw.ru/award?keyword=biology+textbook+9th+grade+miller+and+levine+pdf PDF link annotation
    • http://lemafesopeposuz.mywebcommunity.org/subavikojeresepumala.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/jdkjhe8/fuwetudatusedogalu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401703/normal_6032c05b969e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476007/normal_601b65d932bff.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/c5vXRid/birthday_party_cool_ideas.pdfIn PDF document text
    • http://ximepamodoravun.iblogger.org/zezepa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450434/normal_5ff9febb51d70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_604e9c393dc97.pdfIn PDF document text
    • http://tewosube.mypressonline.com/affine_transformation_in_computer_graphics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490125/normal_5fc86cc6b70cf.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/sony_fs5_used_ebay.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/05215363-1483-4720-bbbc-da8c24b26949/likutavegunuti.pdfIn PDF document text
    • http://zanukabijegur.rf.gd/vipuxaxoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e7d4c4-8a1a-4161-9924-66b428a3a7b7/harry_potter_lego_advent_calendar_2020_tesco.pdfIn PDF document text
    • http://dusalotiwuje.rf.gd/ccnp_security_firewall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98a451bd-d8a1-429f-ae5f-f70ce2373660/how_long_does_keratin_complex_last.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d7d8d90-84c2-49db-af22-373bad004507/panila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a176769a-6e21-4c77-9685-540b4185287a/stairway_to_heaven_chords_uke.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/nisej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62a1d0ac-306e-42f2-9acb-b9459696e251/barogexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6bdbce6-fbc6-4ca6-b11e-01dd9501df6d/miller_211_spool_gun_settings.pdfIn PDF document text
    • http://wegatanubuguze.rf.gd/crosley_record_player_power_cord_best_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab4003a-bab4-4a26-b5cd-5e8fdb6cd40d/78772985435.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_off0000d6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D7 5916 bytes
SHA-256: 035108d214831327721ace8a90c9c3d929f03b58bbea9265882373df560b5379
font_01_sfnt_off0000eae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE2 11172 bytes
SHA-256: c078963233c2a6749ebedc71a66d01628c4577bf9ec298baff39294499de8f64

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