Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e805300bba0948…

MALICIOUS

PDF

102.8 KB Created: 2021-05-14 09:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d52d6ed2b0f72f53c3a2c56ea752040b SHA-1: 285e2f12271d2c828042396d30470278d7ab77b5 SHA-256: d9e805300bba0948fdff9dab69275f04e98a069ea945ebe12ee1bbf6b7b3a4dd
206 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://soxebez.ru/strik?utm_term=text+png+hd PDF link annotation
    • http://bewewafip.scienceontheweb.net/can_american_wii_play_japanese_games.pdfIn PDF document text
    • http://motarojetox.sportsontheweb.net/bertrand_russell_philosophy.pdfIn PDF document text
    • http://xenejesujotolud.mypressonline.com/80198030329.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/jedi_training_school_disneyland.pdfIn PDF document text
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/8364e4.pdfIn PDF document text
    • https://gunutusubev.weebly.com/uploads/1/3/1/4/131437775/4413114.pdfIn PDF document text
    • https://rokumipizo.weebly.com/uploads/1/3/0/7/130776068/52f8167f83bb.pdfIn PDF document text
    • https://gexawagezawa.weebly.com/uploads/1/3/2/6/132682787/rurarabov.pdfIn PDF document text
    • https://sowubibuf.weebly.com/uploads/1/3/4/3/134308786/0af26fddc562a.pdfIn PDF document text
    • http://fijubigatusurov.scienceontheweb.net/aerodrome_design_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/tixaxelubigi/cgiMVii/failed_network_error_google_chrome.pdfIn PDF document text
    • https://cdn.sqhk.co/lenalibuz/ghgcZZF/affidavit_form_used_in_zimbabwe.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/50_soundtrack_-_fifty_shades_freed_2018_full_album.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/95198cc5-6219-44d0-b264-705ef2c3b28b/monitor_cardaco_garmin_forerunner_235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0337e60-5f3c-4294-86de-95591cf56bed/taxode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eeaeea6-4baa-4c0e-91bb-ed948ba547bc/23112887358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/236267ed-ed95-4882-8b67-029f6c2226f2/paruxolilefebogirokixal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/223e9f46-982b-48d6-a9ef-f829526da2ee/spektrum_dx7_reset.pdfIn PDF document text
    • http://legokejapo.atwebpages.com/metal_gear_solid_4_final_boss_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c0808eb-5982-45fd-8ca1-b4b683268d6c/wiwativib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06459112-37cc-4f72-804d-862ea9a837e7/how_do_you_write_chinese_stroke_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/136a7f33-5a3a-4181-a0a2-3d4c19253390/regajaxamepori.pdfIn PDF document text
    • http://pizenusogusu.atwebpages.com/biodata_format_for_marriage_purpose.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000152bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152BC 4720 bytes
SHA-256: 38b4e4dc031da7af7ef0986bcab2fcd6c91b6c3a134e9bff1a82437c27e77bed
font_01_sfnt_off000162cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162CB 1728 bytes
SHA-256: a7921e1f22a3b9f131f1d26e0a30b1579b95f06bc21b675b004e759a1faecb7f
font_02_sfnt_off00016b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B65 9928 bytes
SHA-256: 626918fda797eb82672dde90bb892d14029b7ff220a00dfa57d8c7f2d5c1559a