Malicious PDF — malware analysis report

Static analysis result for SHA-256 531028bf6fea4f06…

MALICIOUS

PDF

67.6 KB Created: 2021-02-16 11:51:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1749d5f8ccceff5ec32c20eb505cc054 SHA-1: 1a61d680bd63d5817f8fd6ec7a8012949c41c13b SHA-256: 531028bf6fea4f06bbdf5dfdf3251d54f14bb0fd07cd755977ff6f8cd22a842b
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://baarspo.ru/wix?keyword=paracord+charms+bracelets PDF link annotation
    • https://cdn.sqhk.co/tezofugowura/xgfRXCq/spintrials_offroad_car_driving_games_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/ha8Mhh9/rogexelanosovunerivajot.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/jOo49ib/build_a_bridge_and_get_over_it.pdfIn PDF document text
    • http://trokot-online.xyz/tepabajotelofurilikasq18.pdfIn PDF document text
    • http://ctyr.ru/us_visa_interview_questions_b1_b2sf0vm.pdfIn PDF document text
    • https://cdn.sqhk.co/bopibege/NmAhbhi/hashtag_generator_free_linkedin.pdfIn PDF document text
    • https://sepetumeba.weebly.com/uploads/1/3/4/6/134601334/e4f7a9337bddb.pdfIn PDF document text
    • https://jegumozapibalan.weebly.com/uploads/1/3/4/0/134013344/5210364.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/YCLdKyn/lightseekers_physical_cards.pdfIn PDF document text
    • http://migerov.xyz/nccn_guidelines_multiple_myeloma_2015bez58.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/W8jeJFj/chikungunya_infection_symptoms.pdfIn PDF document text
    • https://xakijugikirire.weebly.com/uploads/1/3/1/4/131437514/6924031.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://peworesafasar.epizy.com/android_audio_visualizer_tutorial.pdfIn PDF document text
    • http://wegemejejo.epizy.com/ekdantaya_vakratundaya_song.pdfIn PDF document text
    • http://doborokozudu.epizy.com/64162313009.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_off0000ce35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE35 5320 bytes
SHA-256: 08e4a5be7697d2a2dc9bb56798a48b71b1be18625978ea1398c6399b68a71872
font_01_sfnt_off0000e01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01A 9736 bytes
SHA-256: 8148297c5dd59b328ec5e405f9f4eb49cc31007d9a2486860f45805846ff1757