Malicious PDF — malware analysis report

Static analysis result for SHA-256 648ba42b715d4a9c…

MALICIOUS

PDF

91.7 KB Created: 2021-03-05 16:12:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 3520c684b35153be13cdf61b3d5a2ca7 SHA-1: 4f3f34c66328e7775c89aee7738e0e5e9ed0dea1 SHA-256: 648ba42b715d4a9c149962625f579c47514fbb6dc711a0fd2c82cfa739e3f262
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/wix?keyword=f2p+range+training+guide+osrs PDF link annotation
    • http://jupumatoza.iblogger.org/training_implementation_plan_template.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/cjhjbin/lewoxudazagelifeware.pdfIn PDF document text
    • http://muwupofitosiw.22web.org/62666579332.pdfIn PDF document text
    • http://palejep.22web.org/fajevuvixegoxoxupisani.pdfIn PDF document text
    • http://sumovenelexefik.iblogger.org/filmywap_2016_bollywood_movies_hd_1080p.pdfIn PDF document text
    • https://milatesedupodil.weebly.com/uploads/1/3/1/4/131437919/pemorulogusufite.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/cjdghhd/ludo_king_play_online_on_pc_with_friends.pdfIn PDF document text
    • https://vezisadorudaruj.weebly.com/uploads/1/3/4/3/134349324/198a0a.pdfIn PDF document text
    • https://kunudixi.weebly.com/uploads/1/3/4/6/134667289/9b19d3ac75cecbb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://484a0fbd-04e0-416f-b335-41eb3f66808b.filesusr.com/ugd/228afb_7879c93c718140c6aab466c974b2a779.pdf?index=trueIn PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_1a5b45f2894348e089d399e09d14afee.pdf?index=trueIn PDF document text
    • http://zulojazivuvuk.epizy.com/30935533253.pdfIn PDF document text
    • http://gozuxinub.epizy.com/83192425237.pdfIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_7d33aba609d74c039852de5941997d42.pdf?index=trueIn PDF document text
    • http://xapajegawejarag.epizy.com/mutants_and_masterminds_deluxe_gamemasters_guide.pdfIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_5fe29c52a46c4339952d16fe28cc92a4.pdf?index=trueIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_eaf6574d34664cd78605c71ad9c79c13.pdf?index=trueIn PDF document text
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_2d8db57044624688814df319d197251e.pdf?index=trueIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_4aefe5f89f8a4a219840eda4d21fdacb.pdf?index=trueIn PDF document text
    • http://vatapusaf.rf.gd/15603187611.pdfIn PDF document text
    • http://sebilazog.rf.gd/verbos_en_ingles_presente_pasado_y_futuro_lista.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E56 5064 bytes
SHA-256: 4a86f7160105f20f1a4df91adf2c172c02adddd799def19886e1950a661a1cb3
font_01_sfnt_off00012f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F98 10472 bytes
SHA-256: 08367e0bf4ee131ab3661e4872bbc0ec2a4ced3f6b8219ceaee7844a6905c170
font_02_sfnt_off0001536d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1536D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c