Malicious PDF — malware analysis report

Static analysis result for SHA-256 244d101eebdf71d3…

MALICIOUS

PDF

79.6 KB Created: 2021-01-23 13:19:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d62e52186cd66afbacdd41fe9028ed4b SHA-1: d4ee36d3cb0b7ba3c115035034f596498e97fc81 SHA-256: 244d101eebdf71d3df07c4f3e3727cb4690e71abdf5f8e511b8c34b8ad13e4a3
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, indicating it likely serves as a phishing or malware distribution lure. It contains a large number of embedded links, many pointing to disposable hosting services, suggesting a link farm designed to manipulate search results or redirect users to malicious content. The presence of a link to known malicious redirector infrastructure further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=polk+county+schools+nc+reopening In PDF document text
    • https://cdn.sqhk.co/zenetofuma/hDSQhdD/legendary_stuntman_run_mod_apk.pdfIn PDF document text
    • https://towotadop.weebly.com/uploads/1/3/2/6/132682697/gowiwek_rozudegol_luvewomebikiz.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/Ngjibja/80979033170.pdfIn PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/4898484.pdfIn PDF document text
    • https://wuzovogupo.weebly.com/uploads/1/3/4/7/134720757/furapew.pdfIn PDF document text
    • https://site-1173611.mozfiles.com/files/1173611/17147962542.pdfIn PDF document text
    • https://cdn.sqhk.co/rejiwosujupa/QhjggtU/naija_highlife_music_download.pdfIn PDF document text
    • https://sobixalotebi.weebly.com/uploads/1/3/4/0/134017917/dosatu_mevugo_rubawoli_jemelukifex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414173/normal_5fd8552cd40ef.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/ichdiah/33507495420.pdfIn PDF document text
    • http://runatem.66ghz.com/lilac_wine_piano_sheet_music_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kelifevaz/hjewjbs/among_us_wallpaper_live_tiktok.pdfIn PDF document text
    • https://fosegeluka.weebly.com/uploads/1/3/4/7/134717840/6280432.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/Ghchigf/true_fear_forsaken_souls_part_2_organs.pdfIn PDF document text
    • https://cdn.sqhk.co/semegopo/ghoicie/teribosapesu.pdfIn PDF document text
    • https://site-1168079.mozfiles.com/files/1168079/is_nba_live_mobile_basketball_an_offline_game.pdfIn PDF document text
    • https://site-1175777.mozfiles.com/files/1175777/kupemo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jatuxijor.epizy.com/nuzosaku.pdfIn PDF document text
    • http://xigufogadenake.epizy.com/muwebirabozinejivu.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_off0000fc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC08 5152 bytes
SHA-256: 6a2c95c9a7c939f6d6e0e013856f12f96f7ef1735c36fd5b09f7000875dfd143
font_01_sfnt_off00010d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D98 10424 bytes
SHA-256: b20bda99accaa18eea09d283b3833ffb300779e1fd2a27c5dcd02a4cdd70f477

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