Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb60581a57674f7…

MALICIOUS

PDF

78.9 KB Created: 2021-03-12 19:12:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52496a8dd9070ce0775bac223d7c18ea SHA-1: d0134bfe3354f3f4d89a4a62a92c7244398be3d7 SHA-256: aeb60581a57674f7d7308fd71d9711cc72a22a9fcee2984fd3a4c4bf7209cdcd
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and likely phishing-related. It contains a large number of external links, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, appears to be related to driver downloads, a common lure for phishing attacks. No scripts were extracted, but the presence of numerous external URLs indicates a potential for delivering a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/aws?utm_term=iomega+storcenter+ix2+drivers+windows+10
    • https://cdn.sqhk.co/lizasizova/GZjjAFw/shooting_grizzly_bear_youtube.pdf
    • https://cdn.sqhk.co/wisulekekij/Qhdjajb/49718885946.pdf
    • http://kufemotobenin.66ghz.com/perfect_attendance_certificate_template_microsoft_word.pdf
    • https://cdn.sqhk.co/gafisasiwu/UkjvhbT/9952855372.pdf
    • http://sakivometo.medianewsonline.com/schopenhauer_the_art_of_always_being_right.pdf
    • https://cdn.sqhk.co/dabozijide/ubje8gj/best_flute_remix_ringtone_2020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nupepepasis.rf.gd/9148088819.pdf
    • http://simarawi.epizy.com/cuisinart_12_cup_coffee_maker_instructions.pdf
    • https://uploads.strikinglycdn.com/files/5eb55c56-870b-4284-bd97-755b4a099b9e/befodewisarudifufazegi.pdf
    • https://uploads.strikinglycdn.com/files/6347b3ef-f8d1-4e1c-bd7a-29e176092ba9/what_is_the_best_stand_mixer_for_home_use_uk.pdf
    • https://uploads.strikinglycdn.com/files/f4101d8d-276d-4a9c-b3c6-2eddb656a665/honda_rancher_350_2wd_tire_size.pdf
    • https://uploads.strikinglycdn.com/files/17ecf429-b49b-4e52-919a-923a47bbae9a/how_big_can_a_carry_on_be_on_allegiant.pdf
    • http://vilumepidiwego.myartsonline.com/80707946358.pdf
    • http://vafegenowakimo.epizy.com/59816071857.pdf
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_368ba01dcd534bc497eea19c90181d06.pdf?index=true
    • https://s3.amazonaws.com/dukajevo/taree_leagues_club_annual_report.pdf
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_f7e6ba78cf0249f28e7c762babe2fbe7.pdf?index=true
    • https://s3.amazonaws.com/zemigiduwagafu/kitchen_bridal_shower_invitations_templates_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f614.bin
88d71a5b72eb6a41ed3e4c174adbe446bcd4cd5345ee5287f3078d5e46f68a87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF614 5708 bytes
font_01_sfnt_off00010988.bin
1c1bae81c9826b56cac8749fa387ccdbbc93ae7e9a6a47a8a6853d67322bc6c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10988 10860 bytes

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