Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4df49b0faa8ab81…

MALICIOUS

PDF

75.0 KB Created: 2021-03-15 06:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6959cb12a9bf919c615302979f5bfe78 SHA-1: c480d03206430f22355c4be9b94f122a34ae0eff SHA-256: a4df49b0faa8ab81d53c6414ca5c250344e4e417962078f60d88b2abd3552bd4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, many of which are associated with link farms and SEO manipulation tactics. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

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://jacksth.ru/wix?keyword=flighttrack+pro+apk+download PDF link annotation
    • https://dixamagajo.weebly.com/uploads/1/3/4/6/134652312/vewulisimoke_bedosawaros_regubew.pdfIn PDF document text
    • http://dressnbuy.com/how_to_fix_my_ps4_gold_headset7y6oq.pdfIn PDF document text
    • https://sisufowikukutu.weebly.com/uploads/1/3/4/3/134311685/juminewex.pdfIn PDF document text
    • https://xufalawat.weebly.com/uploads/1/3/0/8/130814535/3127228.pdfIn PDF document text
    • http://vodoroding.info/watch_the_hunchback_of_notre_dame_full_movieek6hb.pdfIn PDF document text
    • https://kesesitevon.weebly.com/uploads/1/3/5/3/135317357/betizozof.pdfIn PDF document text
    • https://neverazu.weebly.com/uploads/1/3/4/9/134901342/merumivuwowek.pdfIn PDF document text
    • http://redirunna.xyz/ielts_preparation_test_with_answers9rkzj.pdfIn PDF document text
    • http://zoo-taxi.site/number_system_abhinay_mathsl695k.pdfIn PDF document text
    • http://epaytds.xyz/2nd_grade_math_standards_virginiaax0z9.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/sedowedi/how_do_u_get_a_marriage_license_in_chicago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35ff8e2e-031f-4259-9c01-3dc971732967/45708164514.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/82328140995.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/30336944222.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/kipuritize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4594240f-43fb-42b3-a999-721881f5eebc/87316238362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f57282fe-0641-4490-a8e5-675967359a53/samsung_m2825dw_flashing_red_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68316ed4-f6e1-4244-861c-53e543130be6/catching_fire_suzanne_collins_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ac24818-d1ca-4fa2-b4c6-1d08d416db00/samsung_tablet_sm_t580_auf_werkseinstellung_zurcksetzen.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/chhota_bheem_speed_racing_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13b58558-c342-451c-8cfd-d0dd7b647a14/55244099074.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_off0000e871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE871 5268 bytes
SHA-256: 4ca8004a3886ebfac1b53505ed2b34ac318a7ff8629469380591dabfb2ce17ed
font_01_sfnt_off0000fa6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6C 10548 bytes
SHA-256: 3eab4381f6c8221844216431e4db5c592c414b73dcd9338e928874bf3a5b2f01

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