Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d3c45ae7e2c48d…

MALICIOUS

PDF

91.4 KB Created: 2021-06-01 07:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d3290d82f2ae0337706c9045dd220bdc SHA-1: bd5250945a42bc3b47ed1a0b4465eab6a0497460 SHA-256: 32d3c45ae7e2c48d88c296a819e032dfec1f3b85d02c3db6fac25765f456e22e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a significant number of embedded external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://krisoc.ru/pbw?utm_term=best+pvp+accessories+bleach+brave+souls PDF link annotation
    • https://pasirukeb.weebly.com/uploads/1/3/4/0/134017476/vabafurog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497685/normal_601ef587731d0.pdfIn PDF document text
    • https://ritobawen.weebly.com/uploads/1/3/4/4/134486043/buborut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476135/normal_606e5a3c3d480.pdfIn PDF document text
    • https://vulodimov.weebly.com/uploads/1/3/4/8/134880101/xamewop.pdfIn PDF document text
    • https://kizegugiruliti.weebly.com/uploads/1/3/4/7/134729255/vufusokijazas-torovoxa.pdfIn PDF document text
    • https://jenamojid.weebly.com/uploads/1/3/1/0/131070605/jufuno.pdfIn PDF document text
    • https://fujidefabez.weebly.com/uploads/1/3/4/5/134512048/kukisidurite_tojogomaximu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390057/normal_60306b6c67c50.pdfIn PDF document text
    • https://mojivisosodarez.weebly.com/uploads/1/3/4/0/134096231/bumuvajix.pdfIn PDF document text
    • https://jikodidujur.weebly.com/uploads/1/3/5/3/135319234/3cd21f504.pdfIn PDF document text
    • https://funiduned.weebly.com/uploads/1/3/4/7/134773133/diwexupo.pdfIn PDF document text
    • https://teraxamexad.weebly.com/uploads/1/3/1/3/131380600/7d7a725.pdfIn PDF document text
    • https://tofisijola.weebly.com/uploads/1/3/4/8/134863845/6544928.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/9b22a5e4-cf3e-407f-9e26-542290a81adb/xbox_one_controller_bluetooth_headset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b474ebe-72a6-468f-aaf9-e6ea6a0fdf1a/tebapozugotaweminajil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a27032-3821-451e-ba88-46204c8fd8ce/she_kills_monsters_female_monologues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85904e8f-ad73-4833-bcbd-a1cccfdc418d/fesigaguzojubeputuzuje.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/f/39018140531.pdfIn PDF document text
    • http://wufamazajo.pbworks.com/f/64251168523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/616a2a92-8177-4a28-bcde-19cd46603066/is_procreate_pocket_free_on_ipad.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 5044 bytes
SHA-256: 7ae5b628aa05952fdb2c95430c7651755a6505c7c269679da9b4f7a3b1f6c6b8
font_01_sfnt_off000115f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F8 11520 bytes
SHA-256: efa258829fc84e86959dcc64bef9c98b9d59a1e14b7b48c4dd290ed01167098a
font_02_sfnt_off00013cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB1 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
font_03_sfnt_off00015178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15178 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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