Malicious PDF — malware analysis report

Static analysis result for SHA-256 982349d01ecab810…

MALICIOUS

PDF

84.6 KB Created: 2021-09-18 10:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1391f12e4873258679d70894f3f034fc SHA-1: 6ff2bdced072bbc7c04baab1290e3675eaa64692 SHA-256: 982349d01ecab810e91155295823b842b56d7c4ae82ccf8c3dd7c3d15cae98be
216 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links to external websites, many of which appear to be compromised WordPress installations. A critical heuristic indicates a 'Clipboard command execution lure,' suggesting the document instructs users to copy and paste commands into a shell. This, combined with the ML classifier and ClamAV detection, strongly indicates a malicious intent to download and execute a secondary payload. The numerous external links and the nature of the lure point towards a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://queure.ru/uplcv?utm_term=list+of+apk PDF link annotation
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161394b8360448---88784290242.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/161457777568ca---6815291574.pdfPDF link annotation
    • http://alltimescare.com/attachment/files/89785511461.pdfIn PDF document text
    • http://grandfiltr.com/files/file/96617460429.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/93478488290.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/lafozusegaxoxaparom.pdfIn PDF document text
    • http://mtcnx.com/upload/fckimagesfile/82497865912.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/28abcb6dfe68778931314807157024a7/77232627191.pdfIn PDF document text
    • http://wych123.com/upload/files/fupetelubemipixofuka.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/xibaxidofolivigovaja.pdfIn PDF document text
    • http://playonathletics.com/userfiles/file/sodekupamekepuvin.pdfIn PDF document text
    • https://kentacademymiango.com/userfiles/file/61319452822.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/pamatafewo.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xogegut.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/gipexafogutekosasebeno.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/7a175c38a7b227df12fc6841322335fe/mivuzaperotoraveruxadipo.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/f3120a11c5e2589dcd0faf970956f48b/gefinaxeje.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/24971491086.pdfIn PDF document text
    • https://partnermind.cz/images/files/digaruxuxirazijomo.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/291a78hbo8pk1fdm6p9h4ck6f4/6712030110.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/29514225621.pdfIn PDF document text
    • http://analhospital.net/file/files/41549074822.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/b9af06c6e318896377da62cf55d407d8/85298682320.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/fanaxaferog.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/zojovuxevotali.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BE 10016 bytes
SHA-256: 73ba11bb7148374607e05105c683db56146a291df6d5d32b57d21a4c85594057
font_01_sfnt_off0000f92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001113d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113D 20060 bytes
SHA-256: 48648ebe6ad1b56e060c7f6fb2972916898bb6e9d371d9ad5919a56079198d73