Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8fa18b1a9694e7c…

MALICIOUS

PDF

81.0 KB Created: 2021-03-19 15:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 98f108b4bbf4aa742cd05d52e3d688df SHA-1: ec359ae7ee9605af32b9d6165bc6e6453e83dd9f SHA-256: d8fa18b1a9694e7c6ba32c4e8a9bcf8bcec29f9496b2e115ed4c402be515be14
126 Risk Score

Malware Insights

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

The PDF file contains embedded links and is flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to a 'Bmw x2 manual pdf'. The presence of external URIs and link farm indicators points towards a phishing or redirection attempt to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://vilenefex.ru/award?keyword=bmw+x2+manual+pdf PDF link annotation
    • http://dhl-order.info/how_to_execute_python_code_in_atom_editor2yfvc.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/kA4HjaV/calendar_2021_may_june.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417312/normal_5fd5fdc124f65.pdfIn PDF document text
    • https://cdn.sqhk.co/fifunolew/ijgdkAe/52217583674.pdfIn PDF document text
    • http://wumiwuzigimo.mywebcommunity.org/the_personal_mba_book_flipkart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413346/normal_6037f273a7ce8.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/ageAXjb/game_creator_unity_asset_store.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/gVigGge/walamesojusibozokadu.pdfIn PDF document text
    • http://instasale.company/xutezeoj0q7.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/jon_rogawski_calculus_third_edition_solutions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459323/normal_5fcb975fe19f6.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/jehfidv/modozobifomosugitiniv.pdfIn PDF document text
    • http://milansit.space/linhof_612_manual4tzmi.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/bagisi/sword_art_online_integral_factor_leveling_guide.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/re_zero_light_novel_english_arc_4.pdfIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/how_to_tell_how_old_a_coconut_tree_is.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/jasaleni.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/crossfit_workouts_at_home.pdfIn PDF document text
    • https://3e021c9a-284a-4c54-9ba1-f6d43d4d2ba5.filesusr.com/ugd/a619af_97b1a46981624f91b21787cc9f1d484e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/avery_mailing_labels_8160_template.pdfIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_9e3c52ebacb5452d923cf190534d91f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vawoginele/adjectives_of_personality_vocabulary.pdfIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_78274ce5e78c4df7aa7fc77ed78feacf.pdf?index=trueIn PDF document text
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_9c9861afb22b47fbbbe65ad3d6c4f6d5.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E5 5252 bytes
SHA-256: 63e2ebbd7068fa997e7f1ea5913a619fe91597cd5898615bced1ff48c688f8ce
font_01_sfnt_off0000fbd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD0 11056 bytes
SHA-256: 29f61fff020c54d847b1bb8edc315feac18e6d13b4d35c2fc682948902a36b7a
font_02_sfnt_off000121a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A2 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953