Malicious PDF — malware analysis report

Static analysis result for SHA-256 020df984cd3e46d2…

MALICIOUS

PDF

142.0 KB Created: 2021-04-12 14:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5fc04cb8ceead228d9ad8dbebac48fde SHA-1: b9c949aaf4227c555638f75d1da14a8918d7b09c SHA-256: 020df984cd3e46d240fb27173eddfb4294f312acd0ae55f96930f26c55c18232
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are on disposable hosting and utilize UTM parameters, indicating a link farm designed to direct users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=health+o+meter+scale+app PDF link annotation
    • https://cdn.sqhk.co/pigexebobe/japMwSe/jemosez.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/jshiljd/73489092891.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/7201761.pdfIn PDF document text
    • https://lipefevek.weebly.com/uploads/1/3/1/6/131606222/89f6beab5d2513.pdfIn PDF document text
    • https://cdn.sqhk.co/futidiwe/Tbrnxsp/gumball_and_darwin_voice_actors.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/kij89hj/instrumental_beats_2019_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9eba3c4-4bae-4b4c-9d6d-5190c07bc018/what_is_a_good_meat_slicer_for_home_use.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/wolejixebal.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_276a11100c654cc4b4f7cd4d0f820754.pdf?index=trueIn PDF document text
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_955bdb5820434a209b356475ed8189af.pdf?index=trueIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_806fe276c87a4760b9ad9611685aab65.pdf?index=trueIn PDF document text
    • https://1c896d37-30d1-4b4d-9537-98f963aae812.filesusr.com/ugd/865d50_24f3116d48304872b14e0336c5a8b84c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jevelel/aix_certification_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0140f24d-b684-4ff5-8ac6-9d83dc6da8f5/rufapuvofafow.pdfIn PDF document text
    • http://jowevoxajez.epizy.com/fashion_designing_website_templates_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c750ac-7908-4179-954a-8e4d328c97f5/what_are_dip_switches_on_a_garage_door_opener.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/lowixi.pdfIn PDF document text
    • http://fobapisarut.epizy.com/zixemerexawejosetufulisoz.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/xipuvije.pdfIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_fe83196af277491c92b2ed0de12ccd9f.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00020ebe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x20EBE 17968 bytes
SHA-256: e57ab14f688a0d2c0e145ebdd72a418b5c7fed1ba3c774b6fc51bcdc8ab827c4
font_00_sfnt_off0001927c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1927C 5136 bytes
SHA-256: a45aa81039782fe1cc05b29867cbce2ffe6727c428f619784f17b04ae7c04620
font_01_sfnt_off0001a3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3C0 20800 bytes
SHA-256: 8c84ad78959913f877e001067c91c2ed854172f137fdfe803b487e8b2ccc46a8
font_02_sfnt_off0001c367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C367 8712 bytes
SHA-256: 4c7212254a9ab90949997a6a055eb960f86663ca792635e3494ea613b0209fb1
font_03_sfnt_off0001e395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E395 13408 bytes
SHA-256: a9cf844793f8c580da1212965854eff8d32213a31ff9b8c6fc0156cd83bbeea7

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