Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69c01842bd1826a…

MALICIOUS

PDF

76.5 KB Created: 2021-06-18 19:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df931ef816b456026bafdb593ba198f0 SHA-1: 01f45d39a5e0b70b33312b945e24e175f7295e23 SHA-256: d69c01842bd1826a64d7a67e8e0632cc3f2e80b67b068f0c45324eadc8af3bed
164 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress sites, suggesting it's used to distribute further malware or phishing content. The document body, though heavily obfuscated, contains references to 'movie download', aligning with the lure of a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/3c9eecdc82f31d0470c75d6d2162708b/watosedalo.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ceb93a96df---13164443211.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/0h9vsunvr1df98fcgjgc6vk1b6/79911925005.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/a8eb15a4decd71bd2a24d64d8499e862/13869835429.pdf
    • http://sanders-scottfamily.com/clients/26926/File/zisula.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073fa99e146b---lojivojatutag.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/9828b1ed09b22749ef5e92c3a8d2e6f2/19701535241.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160af97b3b2f33---88863457192.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/muzikudanolamev.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099fa2d633e9---fabames.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/8fe28251eed4c14b560508fe3190b669/sadunanuzirazu.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa136653c73---jojunegubakaz.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160792e2e06e42---sejoriminamomidama.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/47e36f794249d45114490c678ab099c5/3153426046.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7ba8237c09f29480931551988e973610/51122812536.pdf
    • https://ckd-otto.com/contents//files/kolitidivuxusotusadax.pdf
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/siniwalutedekagalikosowur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=anandham+tamil+movie+download
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc2.bin
87af0502074a2ee8c064ef6a5145861e006c730356d760ba153702bf81f356ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC2 4932 bytes
font_01_sfnt_off00010075.bin
7bf2c267fd480cae57c5ee99964b4f4de501ba47534b9149466b914acd712265
pdf-font-stream PDF embedded font (sfnt) at offset 0x10075 10808 bytes