Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a02b6396c3fb44…

MALICIOUS

PDF

78.5 KB Created: 2021-06-20 00:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9f3a84cfd8f015ede6d10e5adc9a8f2 SHA-1: aacfcd2cfd8b3e2ee6d12fcbe458dda07493081a SHA-256: a1a02b6396c3fb4401cfa83769cb96013ffe4961779890c34faefb0a7ff531b6
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to compromised WordPress sites, suggesting a link farm designed to distribute malware or phish users. The document body, though heavily obfuscated, contains references to 'aimbot for minecraft pe', indicating a lure to attract users interested in such cheats. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd239dccef---44094511083.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070a257424ad---96346869674.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160804375755fc---punofotowuweborosorikida.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be9d033f6bd---vuketakujelalogu.pdf
    • https://liniagdanskzydowo.pl/files/lesodubila.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6054c0a13---9158889257.pdf
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/944bc3bfc714b3720cbfcf353e59ca58/5477134408.pdf
    • http://archimax.ch/dynamic-images/cms/file/bonafokujibu.pdf
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/eaf226b29be461cd3064948e528bb454/xevinaput.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bbff9116c---duliliritapikekodejiz.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c7039e67d---25865101957.pdf
    • http://aj-logistics.com/stock/userfiles/file/rigadasegumixigegifiw.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/bd8d8e4768c02ee291f2a5cf877ab8ac/sexivukodudarukebawip.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/clm13h1tu9b9s2q14jb99upb35/97357502764.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aac09b05ea---49669416696.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=aimbot+for+minecraft+pe
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d34f.bin
44cff284ad19b1dd4dfbc63f85d7a9a1431200f447a84e3770e233edff6b2944
pdf-font-stream PDF embedded font (sfnt) at offset 0xD34F 4868 bytes
font_01_sfnt_off0000e3ac.bin
5fe40c225167e454b4e84c5c8aa29ea279c43ed3c88be7d6f054580d3ee17b2d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AC 11388 bytes
font_02_sfnt_off00010a6c.bin
b2cf57f29eb3b5e0c174876c58b70ef8fadd81916e6e05a17acc225f9629e7e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6C 16064 bytes
font_03_sfnt_off00011f01.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F01 4324 bytes