Malicious PDF — malware analysis report

Static analysis result for SHA-256 af32dcba71064f9d…

MALICIOUS

PDF

73.5 KB Created: 2020-12-16 14:19:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a4fbf7a1818afafa4effca1d2692bda5 SHA-1: 98b4af4a577124791acb8cbd68b9eaa0fcc358ea SHA-256: af32dcba71064f9df06b504c31dd44f89e8b63c76418a39f4ccc85b593ac719d
234 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF contains a malicious link disguised as a software crack download, which is a common social engineering tactic to trick users into downloading malware. The heuristic firings for malicious redirector links and ClickFix social engineering attacks further support this. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://traffmen.ru/strik?utm_term=fl+studio+10+crack+flengine.dll+download In PDF document text
    • https://tolirufatava.weebly.com/uploads/1/3/4/8/134879039/4853720.pdfIn PDF document text
    • https://gepopoxano.weebly.com/uploads/1/3/4/6/134663556/1599bf8c157c1f4.pdfIn PDF document text
    • https://bikewodeganesu.weebly.com/uploads/1/3/4/5/134596115/2935806.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d0670c-e361-4380-9193-bed47dca89b1/fujejedenasero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5331211-5ac8-4f7d-b3fa-145b950b3d93/52467798917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/140b58f9-0256-4066-b905-ad3c59f8678b/how_to_get_keys_in_rocket_league.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10d1bea4a794d5645e011/t/5fd1681eb1f69267714aa3eb/1607559198923/furniture_mods_for_minecraft_pocket_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f314438b-4674-4b88-bfaf-1e440c2ea7a6/24645557559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f98c030-b031-4651-a35c-d730b09ce14b/22010667262.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b8b3bd14ff0dd2a863f9/t/5fc5657d9d7936484042ea86/1606772093761/semi_moist_cat_food_for_older_cats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbb4ba96-f8ba-4b9c-bd44-9acc1c16e7c3/tanisowabidafabozuxojamun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/135a5c37-2252-46ad-8cfe-8adaf90da5db/biruxojupefaxebojokijajor.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_off0000d712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD712 5524 bytes
SHA-256: ec016bd2998c4b93fda2b4990af282967dd23d528f4a8d3ed9d968679552d0e9
font_01_sfnt_off0000ea0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0A 11044 bytes
SHA-256: 3599addb3c2df251f820f2895d6c6ddcaa40c5e815887b72e120d8eeaff6dfc8
font_02_sfnt_off0001100e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100E 2072 bytes
SHA-256: 99dc99f891051cdbd138958a66ea6383a557cc7486c0c5acb0cb3ed99139840e

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