Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a57d06d57f0075e…

MALICIOUS

PDF

76.2 KB Created: 2021-04-02 02:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2db92ad37b04c7944bf64adf1b4cc9a7 SHA-1: 5fe6f7c92ba5188d27e68b778d96e844b4260dce SHA-256: 9a57d06d57f0075e316e0e9adc6727549e3198865628d083592b2cb39b512fcd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=how+do+i+fix+the+spin+cycle+on+my+ge+washer PDF link annotation
    • http://nogivubuleduwi.22web.org/catholic_songs_free_tamil.pdfIn PDF document text
    • http://solapp.xyz/marvel_comics_characters_villainscsem7.pdfIn PDF document text
    • http://job-finder.space/taco_bell_nacho_cheese_sauce_caloriesht0wv.pdfIn PDF document text
    • http://pifowovumuwe.medianewsonline.com/59139495293.pdfIn PDF document text
    • http://atomyimperial.ru/5056442183k99bk.pdfIn PDF document text
    • http://hackins.site/tork_ew103b_timer_wiring_diagram3x329.pdfIn PDF document text
    • http://usechambre.xyz/83300353480xf8iz.pdfIn PDF document text
    • http://mmeueue.space/5515377705835mv6.pdfIn PDF document text
    • http://tazikuruwuwozu.22web.org/digital_electronics_fundamental_concepts.pdfIn PDF document text
    • http://zetumitufam.mywebcommunity.org/tovibelujitob.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/the_chronicles_of_narnia_full_movie_online_watch.pdfIn PDF document text
    • http://gipovasota.sportsontheweb.net/police_alphabet_code.pdfIn PDF document text
    • http://fusobilel.iblogger.org/64685958123.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/panalipolifod/kranji_war_memorial_guided_tour.pdfIn PDF document text
    • http://folapopapewoxa.rf.gd/26731488555.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/examkrackers_mcat_physics_10th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/car_game_free_for_mobile_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/98514772366.pdfIn PDF document text
    • http://kubitilabevovup.rf.gd/wozitejapujezemapes.pdfIn PDF document text
    • http://najukelosuned.myartsonline.com/traditional_medicinal_plants.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/what_wouldve_happened_if_adam_had_not_sinned.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_off0000e9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C4 5792 bytes
SHA-256: b387c6ef911b3e506f6142ba84347a824d7d637ebbd89cf927cccc15177eeadc
font_01_sfnt_off0000fd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD73 11024 bytes
SHA-256: 43846989d5a8279b58765580a1c0b00dbcec0cf1bdaebbeb88a57d0bfa984264