Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed867e6f17cc3745…

MALICIOUS

PDF

64.6 KB Created: 2021-01-14 20:52:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 48223a75c31ffd11c104238df808f3e0 SHA-1: 7e4b42692e455d9876d03a8236b0469378c5dd8f SHA-256: ed867e6f17cc37453ef62bb921ee96ed9c77ff01034269e88304f7d54ad7a8c0
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to disposable hosting and a known malicious redirector. This indicates a link farm designed to direct users to potentially malicious content or for SEO manipulation. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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=ranch+view+middle+school+ratings In PDF document text
    • https://fobolobal.weebly.com/uploads/1/3/4/3/134317950/kuxelileki-matukumasod-tavezanened.pdfIn PDF document text
    • https://palezagedubegiw.weebly.com/uploads/1/3/4/0/134017965/4365eb.pdfIn PDF document text
    • https://site-1177405.mozfiles.com/files/1177405/wezapobonebexoniwadinupi.pdfIn PDF document text
    • https://site-1178452.mozfiles.com/files/1178452/small_family_room_off_kitchen_ideas.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/59847.pdfIn PDF document text
    • https://site-1171591.mozfiles.com/files/1171591/paxosisodes.pdfIn PDF document text
    • https://site-1083679.mozfiles.com/files/1083679/xazuxitugexob.pdfIn PDF document text
    • https://site-1171925.mozfiles.com/files/1171925/btd5_free_online.pdfIn PDF document text
    • https://site-1179585.mozfiles.com/files/1179585/26841112473.pdfIn PDF document text
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/gejovimubofap-tipojuvuxutiv.pdfIn PDF document text
    • https://zapizurur.weebly.com/uploads/1/3/4/9/134900478/mudogazenodum.pdfIn PDF document text
    • https://site-1208723.mozfiles.com/files/1208723/59152627997.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fasanag/boolean_operation_catia_v5.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/osmosis_jones_movie_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/cavendish_online_isa_performance.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_off0000bed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED6 5512 bytes
SHA-256: a324cc021fd105b69b30cac59349f90323d083da42d62958d1324829914cc90d
font_01_sfnt_off0000d17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17B 10540 bytes
SHA-256: 575f161a59ada642801d7a5f7c74eb3eaa1f364daa239c4f99a953ec72cb3276

Open this report in the interactive analyzer, or submit your own file for analysis.