Malicious PDF — malware analysis report

Static analysis result for SHA-256 7393f62f91f87894…

MALICIOUS

PDF

77.6 KB Created: 2021-05-30 04:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9c290cd64d769679c6d44758790ea98f SHA-1: 7bc6cb1d9f6d34aaf52964d7c20ecaf5c1b7b528 SHA-256: 7393f62f91f878949a55567cd79500fe30c61f6a83e193de913d0dcd4ab15bc7
144 Risk Score

Malware Insights

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

The PDF file contains a lure suggesting a download, as indicated by the 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristic and the presence of a download button. The embedded URL points to a redirector, which is a common tactic for phishing or malware distribution. ClamAV detection further confirms its malicious nature, classifying it as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/strik?utm_term=how+to+install+gta+4+the+ballad+of+gay+tony PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453344/normal_5ff463e7cb15c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465924/normal_6042e08b0f831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405194/normal_6056c16c3690b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475859/normal_60443d5b7df78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367275/normal_5fddf4f8bad0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448539/normal_600c653ebf158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_6013e9df6cc1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410204/normal_60278ce24e9e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491151/normal_600aa54fc911d.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4386836/normal_60b014d52a926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_60348b73dee34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485436/normal_6001db5488f93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450247/normal_601da0cfca2d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452148/normal_6012882493b6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413846/normal_604f29ecc8b6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407777/normal_60115a907db2f.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/db67f21e-9331-42d3-868b-62c253945e41/tuvifovixalikijutejew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7e82183-ea75-4af9-8992-2953354aacfd/2006_gmc_envoy_5.3_engine_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45a35b7-e1cd-435f-931f-eb95702fbbae/best_push_pull_3_day_split.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79e43eaa-f90f-4286-9744-b88da18e04de/contract_labor_law_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8593cf2d-b88d-4136-bcd6-2d16701d6c7d/miturol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/234e43cb-6f07-4e7b-8686-e6d9b46fc293/what_is_the_best_zinc_free_denture_adhesive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6095f637-e400-436f-9277-5eb4b7bb7ecb/52070864593.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_off0000eefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFA 5456 bytes
SHA-256: 010a9e9a9f9c13b35edcc5a71baa1934b8aafe4f21d330ace986b0abb7b2c662
font_01_sfnt_off000101a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A6 11000 bytes
SHA-256: c15694566f5d651ece676e1d54e0712fb13142b53c2da5150a076d4d360c505c