Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb49864044f60d34…

MALICIOUS

PDF

86.4 KB Created: 2021-06-27 11:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 34130acf852a3488016a1dc2fc31532e SHA-1: f88ca972ad5fb63ffde99ce3b3b820df43e8212e SHA-256: bb49864044f60d3444471bc1cd7fa6e53336e490918d6b227e23e6261107ca1a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and IP addresses, indicating a link farm designed to redirect users. 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 URI heuristics point towards an attack pattern involving redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://catamma.ru/uplcv?utm_term=fun+with+ragdolls+para+android
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b01ba944057---gizibopegoku.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773133a24dc---demaxurixuru.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/904080032b8fc106208e5b3c3a300539/98491507409.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/8dede521b43444053f2dec1c7aff637d/96301611779.pdf
    • http://amphorabeautyclub.com/campannas/file/75030257829.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c0871ee460ba2b6fa3b589e9508eff38/dupisujowokabubasuzudaduf.pdf
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/29692865190.pdf
    • http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/29216477923.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/7fc1210664d6b09805365a3ba9002732/masaxakes.pdf
    • http://quatanggiabao.com/images/uploads/files/62604929738.pdf
    • http://m-s-g.ru/userfiles/files/38637841858.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c88d9f4dd---natadudozatozuxexez.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/41c7cf7b6afdfe3956f04c31624cbb49/ramevekojivaxanaf.pdf
    • http://abwalabamaave.com/uploads/files/9983658646.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948b86e395d---tamumesadexib.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/982251dc6cfe9bf660ba789851057c52/29997975913.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a09f945a4a4---82055561194.pdf
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/19289609005.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/6k3on92aup2gpmutsqj7jdmhnf/zezosowa.pdf
    • http://akinmedikal.com/uploads/file/99361074504.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec89.bin
55f24533b1bf2c3071a9b7929373cb82ee9198ac28a457037057ae3b58021d4c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC89 10700 bytes
font_01_sfnt_off000104ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x104CE 16792 bytes
font_02_sfnt_off00011ce0.bin
a67e9680235ddd0630636b19b0e6ec0874ec21aac2c17dac5883af0899abfa46
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE0 18044 bytes