Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de6242c28be2bed…

MALICIOUS

PDF

148.6 KB Created: 2021-07-03 18:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 148c4a58d9048b248e8561a3648cdd2e SHA-1: b35592fc381a50c3f72b32e3a7c9a2ec5036e219 SHA-256: 7de6242c28be2bedc8f600409c610705303dc6da123dd5c929ae0cefb26575ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests the PDF's primary purpose is to direct users to malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9457

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 https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ffc37f4d1f31e1b370f3d1b23522298b/86340688444.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/radegevodokixedigigevi.pdf
    • http://d4storonto.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/divonutamomawazagoloz.pdf
    • http://banhangcongnghe.com/upload/FCK/file/zifos.pdf
    • https://cambodiaangkorhomestay.com/userfiles/file/xekilenowerevuwakij.pdf
    • https://aiaciran.org/cache/fck_files/file/pemamewakojimov.pdf
    • https://astek-telem.fr/userfiles/file/sabafalofexowona.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1608226fdf366c---89855392391.pdf
    • http://indago-rovigo.it/userfiles/files/wasaso.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/d17c9c7afc88f06da312781499960a3d/75502167393.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160a701b163770---bajorepurekexiler.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb73885d61---nitufimawusizarogutu.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/c7bb167e145dbe38620252fdde0c31ff/26762084438.pdf
    • http://krevue.cz/UserFiles/File/jonojelizewir.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609521d4b1faa---98026496082.pdf
    • http://doo-san.com/userfiles/file/20210522203444.pdf
    • http://www.anjhimayath.com/upload/file/81159492413.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/a8a16dda9014578305879c4b80cecbb7/duvewubona.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac75e4bb6e8---tixaxuvujobuviwuwutegudi.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/68efd6474571d2a8d9058350a2870c3c/nepeziw.pdf
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/93125590725.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/14b4fae677861a073947aec1c7b74750/33931080350.pdf
    • https://adreshosting.com/calisma2/files/uploads/46344540479.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985555b28fa---65450807132.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d989464bb---99883052372.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=dna+denaturation+and+renaturation+ppt
    • 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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b3e3.bin
81cd589dc6922ca53d43ff8fad53df626d2fcd5cc8e794fb46288cd45df5cbdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3E3 10272 bytes
font_01_sfnt_off0001cb05.bin
1775d2212a30da9dd812faee4b75b3a9c48b7554dbd79b09d6fa79d801036436
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB05 21416 bytes
font_02_sfnt_off00020489.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x20489 16792 bytes
font_03_sfnt_off00021c96.bin
f7502428d7eebfa5a298e3af491ba5bd093b832cefc27ebc0a85efdec4729519
pdf-font-stream PDF embedded font (sfnt) at offset 0x21C96 4416 bytes
font_04_sfnt_off00022c66.bin
9ea9197b6a75c7fe67a727ea228f5add925cef9a7182c4c37535d81b948c8910
pdf-font-stream PDF embedded font (sfnt) at offset 0x22C66 16108 bytes