Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed11cc6d73e350eb…

MALICIOUS

PDF

84.8 KB Created: 2021-03-11 07:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: eeb3519922b081adaee97943fd07e4e4 SHA-1: d96d6d430056b256c987cf389eb781ec5c6ea24f SHA-256: ed11cc6d73e350eb8b0b5e43bf9f3b056d2e8b07874b70c4603c33d479c38db7
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many pointing to disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/123?utm_term=eclipse+free++windows+8+32+bit PDF link annotation
    • https://kopepadozuko.weebly.com/uploads/1/3/4/5/134505487/7907253.pdfIn PDF document text
    • https://vobakedipevurot.weebly.com/uploads/1/3/4/6/134661611/pogosalidefubu.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/Ygeijjc/dalizolazubugosujap.pdfIn PDF document text
    • https://lekumoga.weebly.com/uploads/1/3/2/6/132683130/abf0709473826.pdfIn PDF document text
    • https://cdn.sqhk.co/kofelejezem/djhfEkU/froggers_mount_dora.pdfIn PDF document text
    • https://dupudebokuvufex.weebly.com/uploads/1/3/2/3/132303235/1b3f8.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/oyXSjcA/23397731460.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/furegojedexukux.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/calories_in_arbys_turkey_gyro.pdfIn PDF document text
    • https://sizadefo.weebly.com/uploads/1/3/4/3/134381744/1479127.pdfIn PDF document text
    • https://kopupoko.weebly.com/uploads/1/3/4/4/134471128/defupinesi_dofenofokaxiket_vugimi_komedom.pdfIn PDF document text
    • https://fisujurij.weebly.com/uploads/1/3/1/4/131437504/3c6098.pdfIn PDF document text
    • https://falibapop.weebly.com/uploads/1/3/3/9/133997194/loruwem.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://uploads.strikinglycdn.com/files/d4c373d2-ad06-4847-914d-2e548a7c8f70/pepazariloz.pdfIn PDF document text
    • http://motuvogipe.onlinewebshop.net/autobiography_chapter_outline_template_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bf355f2-6a63-4068-9011-aa8369aba8e8/butewusexorujofopib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fba4b65-b69f-4967-8ea0-59958aa1c6e4/electrical_technician_interview_questions_and_answers.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/23040328611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad0bfae-c190-4b4b-9879-b373a1c7938b/1344760031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b2bb124-aca0-4d53-86d3-2fd8603dd505/xodejonowufofofogisezego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9147033-4b61-4ffb-a2ae-7ad0dce4fd62/1496062288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fb9422d-383b-4592-9ba8-227543040a1b/is_there_a_sequel_to_maximum_ride.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5b4777d-5d9d-42e7-b713-bc4613202a18/36346049039.pdfIn PDF document text
    • http://gafodix.myartsonline.com/71268070015.pdfIn PDF document text
    • http://robefowoved.onlinewebshop.net/case_study_bronchial_asthma.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_off0000fc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC11 5408 bytes
SHA-256: 7fe719f1b8c2e01cc479bb5268ec5bc604fe80625fab48b5777eaa218a4df697
font_01_sfnt_off00010e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E89 12496 bytes
SHA-256: 2cc71994ce420aac62b297e765160f0ca018f50b95654f5f347aa1ea8737e63c
font_02_sfnt_off0001372e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1372E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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