Malicious PDF — malware analysis report

Static analysis result for SHA-256 caab2f1e721c0b90…

MALICIOUS

PDF

75.2 KB Created: 2021-03-04 23:16:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 995392ac7ded55617dead273ea871632 SHA-1: 3418a7253d200defecdf7c45eed2fecc5e1323bd SHA-256: caab2f1e721c0b905319516882c44a11f1006128777a2994bc73b5b6546076bd
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'jacksth.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host many links on disposable domains, further supporting its role as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=why+does+my+first+alert+keep+beeping PDF link annotation
    • http://manybigs.space/fundamentals_of_electric_circuits_fifth_edition_solutions_manualq4ygs.pdfIn PDF document text
    • http://feelslike35.com/arteriovenous_malformation_of_cerebral_vessels_icd_10hc489.pdfIn PDF document text
    • http://kismyketio.com/geno_auriemma_contractdu5p9.pdfIn PDF document text
    • http://manybigs.space/sound_blaster_audigy_2_zs_platinum_manuale8rc5.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/94344822652.pdfIn PDF document text
    • http://xujilutobidiko.iblogger.org/11309818603.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/f0giIUt/wasogubudimubakomekebivog.pdfIn PDF document text
    • https://cdn.sqhk.co/papusabefo/Ajbjjie/heroism_quotes_in_beowulf.pdfIn PDF document text
    • http://fruitik.space/tubanopolijevirarasit7draf.pdfIn PDF document text
    • https://cdn.sqhk.co/mapelimujeku/hjdCijp/4_pics_1_word_4_letters_game_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_120cf01196ef4758b373e1cf046eb7fb.pdf?index=trueIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_fec22d2b223f434e99734f77ea8913a6.pdf?index=trueIn PDF document text
    • http://dixuzudes.epizy.com/template_instructions_to_counsel.pdfIn PDF document text
    • https://0a9dc515-c6d9-419f-b4de-d801a8c2a39b.filesusr.com/ugd/760a4c_f1d541f92b7e47999184a5fc2af543a2.pdf?index=trueIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_65f790d888a643b2ada07bc3f8e1fe7f.pdf?index=trueIn PDF document text
    • http://wutejaxevewef.myartsonline.com/sawogovefi.pdfIn PDF document text
    • http://lufafutogixafu.rf.gd/ejercicios_tipos_de_enlaces_quimicos.pdfIn PDF document text
    • http://livuladebugalab.rf.gd/rumi_poems_love_farsi.pdfIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_ec250fc1c58c4a0c926219748cf81ed4.pdf?index=trueIn PDF document text
    • http://bapaxofobawob.rf.gd/tavojawutunino.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 5772 bytes
SHA-256: 6dbea4cf55a1d1cfb2d4f695ff672f81ad09bc9a074d1ca3f37ac37f6baf74f4
font_01_sfnt_off0000f835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF835 11052 bytes
SHA-256: 7e735bb24677bc2337c10f3aef85cd60b3672e4ab22c31419adb717e07984fec

Open this report in the interactive analyzer, or submit your own file for analysis.