Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b625dc3585e9cde…

MALICIOUS

PDF

64.4 KB Created: 2021-01-26 23:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 084c26b7dc7ef8a1ff191e60768257b4 SHA-1: a417bf848825ac410a792a1905c0d8c3a6387901 SHA-256: 2b625dc3585e9cde9e54869e14a85f766ef2c68d4a970d1dae9a148ecb20420b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The primary URL directs users to a site that appears to be a lure for downloading potentially unwanted software, disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to 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://traffnew.ru/wb?keyword=facebook%20lite%20old%20version%20apk%20mirror PDF link annotation
    • https://cdn.sqhk.co/mujejadalale/VOihJ82/eventim_date_de_contact.pdfIn PDF document text
    • https://cdn.sqhk.co/xumefotebe/iiowOSG/zombie_catchers_codes_list.pdfIn PDF document text
    • https://jakilirimilibev.weebly.com/uploads/1/3/4/8/134862861/sategoruvufojumow.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/hg7giH8/natezunidomowaniwizirujez.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/gc0Bmif/baby_size_growth_chart_by_week.pdfIn PDF document text
    • https://cdn.sqhk.co/mulepava/V9igv3k/employee_recognition_award_program_names.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwifemi/fhhgfn8/tikabokul.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/5hahehd/elgato_game_capture_hd60_setup_xbox_one.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/Cheghjh/ice_princess_spa_salon_games.pdfIn PDF document text
    • https://cdn.sqhk.co/futidiwe/80gdojc/bell_bottom_pants_mens.pdfIn PDF document text
    • https://cdn.sqhk.co/lilokimoz/bXR0Ehi/49030267225.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/fejatepudopito/makalah_tentang_filariasis.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/legakefizafere.pdfIn PDF document text
    • http://tipakofixu.epizy.com/anagram_magic_square.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/kumpulan_cheat_game_android_mod_apk.pdfIn PDF document text
    • http://setekavapitefe.rf.gd/23331921498.pdfIn PDF document text
    • http://bewaxupu.rf.gd/blank_puzzle_pieces_template.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_off0000be64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE64 5436 bytes
SHA-256: 1942de920cfe4cd39632c499a83de3837b906c1172073b264973778d467a13d0
font_01_sfnt_off0000d0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CD 10620 bytes
SHA-256: 2dd413e40546c3d0e03c2a8392942aa8d4fed4bc51a149bc440947f79e5444ae

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