Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e42c8a235ae46ef…

MALICIOUS

PDF

104.1 KB Created: 2021-04-09 02:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: dd888979608ae2974f435718361c77a3 SHA-1: 0ca36c942e9b9cb584b030ff6d9a5188a30a92aa SHA-256: 2e42c8a235ae46ef59c17b41c2e08088c9eb1dca6cde28be7f89cf2ce97cda51
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, indicating it functions as a link farm. The presence of multiple disposable hosting domains and UTM parameters suggests a phishing or SEO manipulation scheme. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely involving the redirection of users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pelibifir.ru/strik?utm_term=ingenuity+cradling+bouncer+weight+limit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4480743/normal_5ffcfab1b74ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419205/normal_5fd11dc873a7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405903/normal_6054806b531fc.pdfIn PDF document text
    • http://igcopyrightverify.com/7870760470jdctq.pdfIn PDF document text
    • https://sekowuwumobof.weebly.com/uploads/1/3/5/3/135394032/2225691.pdfIn PDF document text
    • https://nadenekaf.weebly.com/uploads/1/3/0/7/130739264/4137046.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413121/normal_60031db78c5d4.pdfIn PDF document text
    • http://onlyforyou.space/what_are_the_twelve_maxims_of_equitymxbhx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367916/normal_605505653eca2.pdfIn PDF document text
    • http://homiak.fun/31179838139erd2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389106/normal_60403e7978dd1.pdfIn PDF document text
    • https://dupukixulin.weebly.com/uploads/1/3/2/6/132681516/batexepuzidid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444102/normal_6021022fdfbf0.pdfIn PDF document text
    • https://pevumufaropis.weebly.com/uploads/1/3/4/7/134706438/137aa.pdfIn PDF document text
    • http://axecheat1.xyz/how_to_calculate_volume_cm_to_ml1cp6u.pdfIn PDF document text
    • https://zolotamazuragif.weebly.com/uploads/1/3/2/7/132712333/5221650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486220/normal_60223d730b5f1.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/68463077-6491-470a-b0d3-1c00f92ba62d/employment_equity_plan_template_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13477788-6cee-4fe6-9766-3ca0c9b976cb/pofejiruk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc0996c-256e-44e8-bdb2-4f5ab2e9f9a3/visekenazagarute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f15951cb-f2c7-4c4c-a01f-77e1324eda2b/98286416532.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/62496063935.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/bebexapedeputi.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_off0001573f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1573F 5444 bytes
SHA-256: a6fa985eb54bb8a7267bdfd058043ca7474cafb708fba2467bc000a081cea00f
font_01_sfnt_off000169b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169B4 12176 bytes
SHA-256: f59d0780d7193897b6a4f3a527a598597fcc960f45e34ceba86522b576bc1bb7