Malicious PDF — malware analysis report

Static analysis result for SHA-256 244a6802d2860760…

MALICIOUS

PDF

86.7 KB Created: 2021-03-02 18:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 49c58d1a33fb6d1c841f2e7c72523a95 SHA-1: 9d5e8067424e7a8956ca32c101b3cf383ca31c88 SHA-256: 244a6802d2860760a68a614c15100bbb9fa474c1e3ad268988da5d0985b59598
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://vilenefex.ru/strik?utm_term=hp+42s+programming+manual PDF link annotation
    • http://pazifelurup.medianewsonline.com/72780275860.pdfIn PDF document text
    • http://lianhua.life/ge_water_softener_not_working7jr4z.pdfIn PDF document text
    • http://italy50wow.pro/project_coordinator_interview_questions_answersxqkup.pdfIn PDF document text
    • http://love-your-lips.online/6708378617kbd9l.pdfIn PDF document text
    • http://uscarinsurance.info/32684259323jt0l.pdfIn PDF document text
    • https://cdn.sqhk.co/riwaxagi/Yhi8gfM/picsart_wallpaper_hd_2019.pdfIn PDF document text
    • http://bamigewagozajom.iblogger.org/rangoli_file_free.pdfIn PDF document text
    • http://pazifelurup.medianewsonline.com/vakajotokuta.pdfIn PDF document text
    • http://allerop.xyz/mafasuketeginuriluxanonij89jj.pdfIn PDF document text
    • http://design-kvartira.info/waludeturav1yu5.pdfIn PDF document text
    • http://legendnat.space/jigelalafuritoduvugflfr5.pdfIn PDF document text
    • http://instapodarok.site/discomfort_is_the_price_of_admission_to_a_meaningful_life_susan_david4t0um.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kujesulad/active_bandpass_filter_design.pdfIn PDF document text
    • http://ziwezamo.epizy.com/2111944554.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/dodecahedron_calendar_template.pdfIn PDF document text
    • http://ruvedinaz.rf.gd/scratch_cards_all.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/27211375954.pdfIn PDF document text
    • http://fereralud.epizy.com/install_android_sdk_ubuntu_16.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE1 5004 bytes
SHA-256: cc3a827e881d7f305b8bba421bbf99d12670bae14a742bd3e3b5d0a225096ecb
font_01_sfnt_off00010dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBF 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00011922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11922 11012 bytes
SHA-256: 3462ce002352a3110393aba4c02cc5dfefc787bcf63425c7c481fedc8e5cfc07
font_03_sfnt_off00013ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ECE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361