Malicious PDF — malware analysis report

Static analysis result for SHA-256 749fa01b53349437…

MALICIOUS

PDF

84.4 KB Created: 2021-03-31 02:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e12d7735dce0817f331be5dbd9928fb7 SHA-1: 3c742431ec4b0394c6cdc919d874097a7dc6c608 SHA-256: 749fa01b533494375f21dd43d9cf7ba5fb6ac1ef4c5737d4c77e149f083048ab
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, indicating a link farm designed to direct users to potentially malicious websites. The ClamAV detection and ML classifier flagging strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to exploit users through deceptive content and external redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://midufefew.ru/award?keyword=cable+management+system+pdf PDF link annotation
    • https://cdn.sqhk.co/numovasovev/guidigs/62377145252.pdfIn PDF document text
    • http://natikolom.site/kenamuzetebafimegamtvv2j.pdfIn PDF document text
    • https://cdn.sqhk.co/tatonabufule/gqji5gh/wasenesefiboloxifo.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/s1ih4hj/ben_10_omnitrix_glitch_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/gijhMSB/candy_crush_soda_free_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/pegatorapo/z2PQjbk/9558725522.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/51916306587.pdfIn PDF document text
    • http://mereritijazos.scienceontheweb.net/jagufusagi.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/1TiaWgj/bits_and_bolts_meaning.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/hp_elitebook_8460p_launch_date_in_indiayn8kp.pdfIn PDF document text
    • http://alexandreablog.com/how_much_will_playstation_4_cost_on_black_fridayp8qs7.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/canon_mp240_printer_driver_windows_xp.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/hihahiS/sound_meter_decibel_meter.pdfIn PDF document text
    • http://delabozaxexiris.getenjoyment.net/diagnostico_socio_ambiental.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/jib7El7/easy_latin_crossword_puzzles.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/3cbPgd9/beer_pong_pocket_edition.pdfIn PDF document text
    • http://uspeh.icu/star_wars_revenge_of_the_sith_incredible_cross-sections0rzlw.pdfIn PDF document text
    • http://ladekepevij.mygamesonline.org/andrew_loomis_espaol_dibujo_de_cabeza_y_manos.pdfIn PDF document text
    • http://tebepif.22web.org/13446253131.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_3d44c56f61ff418fb7c22c22f6c4e957.pdf?index=trueIn PDF document text
    • http://vigujabufovejo.rf.gd/how_to_reset_a_rainbow_vacuum.pdfIn PDF document text
    • http://bitujavoza.epizy.com/92202408541.pdfIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_97a45f2dc49341d297db441095023a29.pdf?index=trueIn PDF document text
    • http://beduxuluwuniva.rf.gd/popekalug.pdfIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_9f3ab78413584c788eb3ea2ac1164c04.pdf?index=trueIn PDF document text
    • http://vewetumizobu.rf.gd/crbsi_guidelines_2018.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_off00010e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2D 5412 bytes
SHA-256: cd62782d461566e7f2e58378981b5852d304e43ee5cadb0257bd29867528cf05
font_01_sfnt_off00012089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12089 10288 bytes
SHA-256: e6f9f8021a3ece2edfdfc869ac4a040b53094ab88487d78916ea1c4620397967