Malicious PDF — malware analysis report

Static analysis result for SHA-256 a126a777a3292961…

MALICIOUS

PDF

88.8 KB Created: 2021-08-21 16:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fb42bfc8d4aef1f8bb18b2767ea9d90c SHA-1: 72f2a6ff9c31bae40238ec155b14b6d22cf33a8f SHA-256: a126a777a3292961a67fa90d7adac631cd1eeb4611068c545cf67f5478cac8f6
236 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

This PDF document exhibits strong indicators of malicious intent, including a high ML classifier score and ClamAV detection as a phishing trojan. The heuristics indicate it's a link farm and attempts social engineering by instructing the user to copy/paste commands into a terminal (ClickFix attack). This suggests the PDF is designed to lure the user into executing a command, likely to download and run a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://krantiservice.com/ckfinder/userfiles/files/direk.pdf In PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/9pbl2l6bhril30m816a3nlkh3e/35238179366.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/7e026036b879eed408112e5e1544b309/33124987778.pdfIn PDF document text
    • http://www.moyekolodin.com/files/mifowoz.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/kopuz.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9fa96c9b8---batadepolujep.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/rilakuje.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/wusijalipe.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61e6db1aa2---50406796979.pdfIn PDF document text
    • https://bem-sa.com/img/file/dajoraxir.pdfIn PDF document text
    • http://kidneytexas.org/clients/861060/File/96140200441.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/fadokojakawoxakuf.pdfIn PDF document text
    • http://rowsontw.com/shopadmin/upload/files/70536227529.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/60232303658.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/56547114438.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/tevefenapitozetivuwepam.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a996f45577b---rofosewi.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/tomox.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/dukifavol.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0919c2570f---zusejolixenuxoruguwoj.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/73821084883.pdfIn PDF document text
    • http://olversonfamilyreunion.org/clients/5/51/51a48c89da211807e19ed56f8a1a1822/File/rumurosunitonoporur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+use+chisel+and+bits+minecraftPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEF 17032 bytes
SHA-256: f2927a084258650cc841fd4be88ceceb068386c92b4e52d17d788401dffb2b49
font_01_sfnt_off00010b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001238e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238E 16064 bytes
SHA-256: a013ce2342554bbd70a9f85285a6053b67e9b25eaba0dd22223cc179b1b1ea16
font_03_sfnt_off000138a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A3 11060 bytes
SHA-256: e3a762495b29b6e2ae087960297a6bb968d246b23371f5e6e7f5f17b95f22ecd

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