Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f7bd53c0040c92…

MALICIOUS

PDF

69.3 KB Created: 2021-02-17 20:50:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 00b90cc1479cda5be5c30ead4753918c SHA-1: f183e05aa5379a6233f81642f798dcfa6fc92884 SHA-256: f0f7bd53c0040c92b25573ce463814b33761e080ba48bf413aeb7a45075b29eb
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/wix?keyword=dirty+deeds+done+dirt+cheap+tablature In PDF document text
    • https://cdn-cms.f-static.net/uploads/4462696/normal_5fdc837b85490.pdfIn PDF document text
    • http://joguxujeganu.iblogger.org/ableton_live_9_lite_project_files.pdfIn PDF document text
    • https://vuwisirikufav.weebly.com/uploads/1/3/4/7/134765545/mofibixem-mejedaleg-gudolujoj.pdfIn PDF document text
    • https://fekazivijiwawad.weebly.com/uploads/1/3/4/6/134687088/5965830.pdfIn PDF document text
    • https://nogexumojadug.weebly.com/uploads/1/3/4/2/134235638/fajawofapimupi.pdfIn PDF document text
    • https://pogunokele.weebly.com/uploads/1/3/0/7/130739789/kizivukovavuxivevat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459055/normal_5fff3270ed24f.pdfIn PDF document text
    • http://gefejisu.22web.org/acoustic_guitar_images_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zetikitor/gj0mig6/auction_application_script.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/ijcjeUZ/bomb_hunters_mod_apk_2._0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_6016d3608789a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_5fe9e500ed405.pdfIn PDF document text
    • https://fukituxepuronip.weebly.com/uploads/1/3/4/6/134605821/korirujejezilageb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453105/normal_5fcd70069375e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403673/normal_5fcf606cd8044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408992/normal_5fd1028e650f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380395/normal_5fe8f3a7ba4ad.pdfIn PDF document text
    • https://vepovipozo.weebly.com/uploads/1/3/4/4/134472033/jafeg_vetitika_moxomijinow_luwutonowaza.pdfIn PDF document text
    • https://gasimela.weebly.com/uploads/1/3/1/3/131398285/benukenogajija.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rumasujosunux.epizy.com/2017_camry_specs.pdfIn PDF document text
    • http://vimonaker.epizy.com/multipart_form_data_json_spring.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_off0000d10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10B 5404 bytes
SHA-256: a63e589b69a6dd5d60d39f0f950f9bc88c1448dbfea0136585b6c482a270c7ac
font_01_sfnt_off0000e36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36C 11336 bytes
SHA-256: 34c2a83e2b3ec2f2276dfcaf89b09d8a43613979d34a8f0c250dcd473d558eed