Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a4205696129962…

MALICIOUS

PDF

86.3 KB Created: 2021-01-17 22:19:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05e5bedee52b88859762e0ab344f665b SHA-1: ec34ebc04506d30c2d25a7b32e4c51e07d1943bd SHA-256: 26a420569612996254e2f4dffd2cc11c3535fc5039ea5b1efdeec4255a87c4da
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs suggest an attempt to direct users to external, potentially malicious websites. The presence of numerous links on disposable hosting indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://traffmen.ru/123?utm_term=lucas+red+n+tacky+wheel+bearing+grease
    • https://tanugerilat.weebly.com/uploads/1/3/4/5/134528704/bd264f4.pdf
    • https://zajuzazoni.weebly.com/uploads/1/3/4/8/134891144/8054340.pdf
    • https://site-1174029.mozfiles.com/files/1174029/765792754.pdf
    • https://dejokorakas.weebly.com/uploads/1/3/1/3/131379117/vozudizakavofenukilu.pdf
    • http://pafekusiwajida.66ghz.com/miracle_box_crack_2._89.pdf
    • https://cdn.sqhk.co/zigimovovu/ibbKibw/95616164099.pdf
    • https://site-1178836.mozfiles.com/files/1178836/lejidogesimogize.pdf
    • https://kutufexefe.weebly.com/uploads/1/3/4/6/134695169/9793020.pdf
    • https://cdn-cms.f-static.net/uploads/4500208/normal_5fdc8d5a3c2ab.pdf
    • https://cdn.sqhk.co/vuxesojogugu/xpiaT9r/35012339877.pdf
    • https://simavaxefawok.weebly.com/uploads/1/3/4/6/134666246/6194898.pdf
    • https://doxavigefixo.weebly.com/uploads/1/3/5/3/135391607/5b86cb6e1c9c.pdf
    • https://cdn.sqhk.co/kelopifagisu/diggiiB/does_cold_coffee_increase_blood_pressure.pdf
    • https://cdn-cms.f-static.net/uploads/4384472/normal_5f8dfcaf7d21f.pdf
    • https://site-1177111.mozfiles.com/files/1177111/basketball_tournament_games_online_unblocked.pdf
    • https://kapovisawok.weebly.com/uploads/1/3/4/6/134652754/4805192.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbb0.bin
e8b01688d06430190461e1a398a7452cba0cb91065e147e6e6f632ce05f339e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB0 5540 bytes
font_01_sfnt_off00010e9c.bin
abf4c36143ddb59f8025fef5437e1dca30bc9512b77648d6d68bf4fe77b3d6e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9C 11620 bytes
font_02_sfnt_off0001360c.bin
afeab2ef9928417a3464dd1c2d94549d9e6f7a7faab1410f1e7ca8a5452d6dd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1360C 16164 bytes

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