Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed487de857642850…

MALICIOUS

PDF

67.7 KB Created: 2021-06-24 03:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ce0c8a53f656a9dd78195048bc80f8f4 SHA-1: 9b205afe6972481da4b681f9dacdd75098cda7d7 SHA-256: ed487de857642850f7a7d28f336c664f15db8db14fc8248f0ce13853f5ec7597
164 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, directing users to various compromised WordPress sites and potentially malicious URLs, disguised as a printer manual. The presence of multiple external URIs and a link farm heuristic suggests an attempt to redirect users to malicious content or download further malware.

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://irlanc.ru/uplcv?utm_term=canon+pixma+mp270+manual+pdf PDF link annotation
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dc1d58fee---fesijifixuma.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078aa2a7f5ac---fakalopiwibexogirunuvipi.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/96146038427.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/75d07e38ce2f8f72b6e9a5f3131161d5/deligezujojesitukekapu.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/c38932de41afda00606d7db68d2d8f85/59396764419.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/b980ff4ea0491f2888641f95b58a8057/9868028338.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160859ca2a7959---sovutosabalironuna.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aea52f6e3f1---72903711865.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/615f2819a290a4312991f96812651c62/jetudabodenajubo.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6f099ef3b---likifujiranumijowinato.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d2fea95d8---28211003182.pdfIn PDF document text
    • http://valleypainclinic.org/userfiles/file/nasawivil.pdfIn PDF document text
    • https://ilcaminodaugo.it/file/84504542720.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/ee270de7431271950a55cd17b08957d5/zovotigilalutukovatefew.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/duzuvubewojugedanuba.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/82033548859.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609448fc32019---mutifawugus.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/rubobujafud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC860 5240 bytes
SHA-256: 6955d5e8d2915e5b2250187057aa933924a8ebdb3fbd042877ca67921e37b6c0
font_01_sfnt_off0000da37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA37 12276 bytes
SHA-256: 2edf5ca73f9e50454800a1561fb1b5577e5b31b524a2d582e5319a3eed21cb6a