Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f6fac7ec4e5931…

MALICIOUS

PDF

77.4 KB Created: 2021-03-25 19:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 180babd95d1249174808a92127b42f9a SHA-1: 39f7c7c742232dc2eff703ed7e59c71fc19ebab0 SHA-256: f0f6fac7ec4e59313ee2137c246078c9a4839eaa27e2c7bc35da6a8c8b5ffd1b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by multiple heuristics as a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body contains garbled text, suggesting it is not intended for direct user consumption but rather as a vehicle for the embedded links.

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://nipisod.ru/strik?utm_term=cuanto+mide+hobbit+bermudez PDF link annotation
    • http://sarupunojupud.sportsontheweb.net/lapoluju.pdfIn PDF document text
    • http://rozefuzapotor.iblogger.org/bar_graph_in_android_github.pdfIn PDF document text
    • https://bajewenizuku.weebly.com/uploads/1/3/4/4/134475359/3ae33f9a53.pdfIn PDF document text
    • http://mujuwowewo.22web.org/fapawunaxetun.pdfIn PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/b106843e5bd70.pdfIn PDF document text
    • http://nakodinita.scienceontheweb.net/29016431788.pdfIn PDF document text
    • http://kedamijofulufep.mygamesonline.org/xomitenagosid.pdfIn PDF document text
    • http://mogimetekojubar.scienceontheweb.net/6609633117.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_de0ed1a5456b41498b23298f82452426.pdf?index=trueIn PDF document text
    • http://jevabatogi.rf.gd/multiplying_decimals_by_decimals_worksheet_5th_grade.pdfIn PDF document text
    • http://dapibudajemuk.atwebpages.com/sawewipid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b947c05-c820-4e4d-92dc-37d91f4ecaf3/early_childhood_development_theorists.pdfIn PDF document text
    • http://kebanibaru.epizy.com/comptia_security_certification_guide_ian_neil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5b24ef-2aff-4294-a9c2-9b65b17267ea/46825364940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea37127f-044d-423d-99e8-26a40d36b05e/what_veggies_are_good_for_what.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4234165d-05d2-4b23-9ee6-4e1f89faf87a/total_gym_xl7_home_gym_reviews.pdfIn PDF document text
    • https://1adbf7dc-3554-4c68-8465-6ff6db008d0f.filesusr.com/ugd/f34823_af53914bcc7043ed894127f194ab15b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b87a6280-6ade-47e8-a042-50ddb68d2e03/mekopunugozaposu.pdfIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_8341aa237a324e1192fab62cc64d5ea1.pdf?index=trueIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_927d8128f4a94043b3a687bc443291f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3184b4a-7d96-4178-84a0-8381f10819ff/2016_ford_mustang_ecoboost_premium_convertible_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfab5994-74e5-4106-8644-cbf25642a499/30087698119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/020f6227-45ba-46e6-9b84-81d047e77a0e/55128820262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a5e870-6427-436b-81ef-044c4221b106/woods_outdoor_timer_50013_manual.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_off0000ecc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC2 4952 bytes
SHA-256: 32cf37238c1474350400904c07f5c63eb192fd56b5ac3fae798d22e749607c68
font_01_sfnt_off0000fd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD68 12928 bytes
SHA-256: e476386954e545d226970b5ff7982704dfba3b6150cc2247c8fe5686095f1c34

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