Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe334dc214f1ff3c…

MALICIOUS

PDF

80.4 KB Created: 2021-03-14 22:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3c0e8c5b31b1e97e9ae5177280152ae8 SHA-1: d2064e68b739088d6eb5e8907304fff50cbc8529 SHA-256: fe334dc214f1ff3c2e8b6d1d772988f6c757539646f0b4b4ef63e4d200e8ce2e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to disposable hosting or unknown domains, suggesting a link farm designed to redirect users to potentially malicious sites. The PDF's structure and the presence of external URIs indicate an attempt to lure users to external content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://kuzutuzo.ru/wix?keyword=the+assumption+song+chords+and+lyrics PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367921/normal_6008d55156dec.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/ieJntCv/diamond_minecraft_seed_pe.pdfIn PDF document text
    • https://cdn.sqhk.co/rukugewul/eluuNge/contents_page_template_ks1.pdfIn PDF document text
    • http://bujinolemisizam.iblogger.org/concrete_mix_design_aci.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471688/normal_5fd39d9f00c1c.pdfIn PDF document text
    • http://bifokagomasema.iblogger.org/how_expensive_are_acura_repairs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486356/normal_6025aaf2dc4a6.pdfIn PDF document text
    • http://zakoroxani.22web.org/autonomous_weapons_systems_law_ethics_policy.pdfIn PDF document text
    • https://cdn.sqhk.co/tedefoso/frhdLhb/messenger_update_2020_free_download.pdfIn PDF document text
    • http://widuzuduzudovix.iblogger.org/zibat.pdfIn PDF document text
    • http://xobapadu.iblogger.org/jalizetu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427105/normal_600089278be34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5faecec-5aae-48dd-af74-0d4d07e604fd/intellichlor_chlorine_generator_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ca31471-35fb-4c89-85b6-0e558ece5ab5/96749431700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7518a430-5e00-495b-ade4-566e08a0238b/how_to_set_a_motion_sensor_flood_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/becf4e3c-e5e8-47a7-8ce2-4885fdb7c1c3/how_to_make_a_pistol_shooting_stand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9939303d-dcf5-4fbe-a79b-263a8030587f/samsung_7_series_65_mu7000.pdfIn PDF document text
    • http://pukafenofi.epizy.com/jawifub.pdfIn PDF document text
    • http://tebalakafepikob.rf.gd/bejonomez.pdfIn PDF document text
    • http://woxebolinos.rf.gd/love_yourself_answer_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63786738-f251-4b7e-a85e-e4de2da7f035/gexanizarodoxulezeno.pdfIn PDF document text
    • http://tasetexogop.epizy.com/22019187408.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_off0000fc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC99 5536 bytes
SHA-256: 717e772ae5e3edbdf79e2286a316aa24ac5eaacca716b25ae3ce21c0d8f779c4
font_01_sfnt_off00010f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F49 10820 bytes
SHA-256: e056a9a7f81aa55905940be557cc1dbcd1fe47660bba53abc3a9cacb258c517e

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