Malicious PDF — malware analysis report

Static analysis result for SHA-256 afed4542fc9bf3b6…

MALICIOUS

PDF

124.6 KB Created: 2021-03-28 02:48:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 549bd95cc6cb8bd91b3f71df5b44c3a6 SHA-1: b4e615355a094b573e8d4f36f0b5b0339622f9d8 SHA-256: afed4542fc9bf3b61ab3268cd5eb87a50b8d0a1dc5fa0e0d36769813b50e020e
204 Risk Score

Malware Insights

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

The PDF contains a link farm and a lure suggesting a password-protected archive, indicating an attempt to trick the user into downloading a payload. ClamAV detection and ML classification strongly support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to facilitate the download of a second-stage malicious file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://xezojetit.ru/123?utm_term=connexions+methode+de+francais+niveau+3+answers
    • http://blubadgehelp.net/geometric_patterns_worksheet_4th_gradesja19.pdf
    • https://wugeneziwepuzi.weebly.com/uploads/1/3/4/4/134494794/bivanu.pdf
    • https://kikimegaxexamez.weebly.com/uploads/1/3/5/3/135392900/917510.pdf
    • https://tilawifi.weebly.com/uploads/1/3/4/4/134480999/3555169.pdf
    • https://gimelasu.weebly.com/uploads/1/3/4/5/134513778/4092584.pdf
    • https://zonotilikoper.weebly.com/uploads/1/3/1/0/131071062/654566.pdf
    • https://zilexewutefak.weebly.com/uploads/1/3/4/6/134608169/liwasunan.pdf
    • https://zabaruwizugode.weebly.com/uploads/1/3/4/5/134596412/xumigumajosefab-gebusadu-ganodevamev-witusezezibez.pdf
    • http://findattime.com/fantasy_miniature_scenerys2ues.pdf
    • https://static.s123-cdn-static.com/uploads/4403413/normal_5fca6f211ebec.pdf
    • https://cdn-cms.f-static.net/uploads/4478667/normal_6052f7d52ebd2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_3ed1f30553f04b86acf3817c9d86b8d4.pdf?index=true
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_ca31c6aefe8b47a2937f4cba00d51014.pdf?index=true
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_24d29d1553cb47a3a9768b0fdd8f7f6c.pdf?index=true
    • https://s3.amazonaws.com/zubuwujoxom/is_it_possible_to_manifest_a_specific_person_into_your_life.pdf
    • https://s3.amazonaws.com/palevijuj/14279817558.pdf
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_1b600aa0b29641eab10e6410059bc287.pdf?index=true
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_250aaf89a0124c23b2c479479030c1dc.pdf?index=true
    • https://s3.amazonaws.com/wovigebi/bobexulazuluva.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001c801.bin
6aa9581165042dd268b13f49e3c7a4f8a712abf82adfaa7863e733c38d2ddaa3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1C801 17456 bytes
font_00_sfnt_off00016805.bin
b99e911a85ce66c38e05ac84b7ed750083657d615955bbf2ff2bc04529b59c91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16805 6212 bytes
font_01_sfnt_off00017d41.bin
18a8324e916acac1fec8eed73ad67e8ff8951ef325737b59ce84477ab583426c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17D41 5516 bytes
font_02_sfnt_off00018fec.bin
d6a750af4c72bffc5ea4b22aa300076c72678d176e96451414f7b12d178434be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18FEC 18636 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.