Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7101653ba9302cd…

MALICIOUS

PDF

72.7 KB Created: 2021-01-10 12:01:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 711f090f3708ce12bb83b3015c1fbfbb SHA-1: 7410fe0270adf056173cee1802b3903b80075118 SHA-256: f7101653ba9302cd1f7a95d624d33454f3410eefe3cd8c4be400929e188d30cd
184 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with one specifically identified as a redirector to known malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous links suggests an attempt to lure the user to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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://gettraff.ru/aws?utm_term=caperucita+roja+worksheet+answers In PDF document text
    • https://site-1173584.mozfiles.com/files/1173584/soroxagara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493282/normal_5faddb395cd58.pdfIn PDF document text
    • https://site-1168055.mozfiles.com/files/1168055/warriors_draft_picks_2020.pdfIn PDF document text
    • https://site-1176699.mozfiles.com/files/1176699/76591993361.pdfIn PDF document text
    • https://site-1172648.mozfiles.com/files/1172648/75895475367.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/5040126.pdfIn PDF document text
    • https://site-1174838.mozfiles.com/files/1174838/nba_jam_ea_sports_free_download_ios.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370778/normal_5fcd960c8c8a9.pdfIn PDF document text
    • https://panesiwosejel.weebly.com/uploads/1/3/0/7/130739396/fijivekotavibuj.pdfIn PDF document text
    • https://site-1177512.mozfiles.com/files/1177512/putufizubijurotufunajit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448345/normal_5ff21220b7853.pdfIn PDF document text
    • https://site-1177041.mozfiles.com/files/1177041/44209578833.pdfIn PDF document text
    • https://bizavurodetilu.weebly.com/uploads/1/3/4/3/134391156/suzorevaxenagol-zukanilowesukor.pdfIn PDF document text
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/1940779.pdfIn PDF document text
    • https://somirurawepaf.weebly.com/uploads/1/3/1/3/131381963/tabav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479460/normal_5fb95c0342cb7.pdfIn PDF document text
    • https://biwilodumiz.weebly.com/uploads/1/3/4/3/134319983/350329.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD566 5128 bytes
SHA-256: b4f38c2607764e1159e22d1e1bc7012a70c30f4e9cf4f7a32ccd16a4825b69c0
font_01_sfnt_off0000e6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DC 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000ef6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6A 11428 bytes
SHA-256: 14a0c3edf6f778d470c6695f6e742226b9565732f2ff38303b8fe7314e1c0aee

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