Malicious PDF — malware analysis report

Static analysis result for SHA-256 1292c0d90820472a…

MALICIOUS

PDF

87.1 KB Created: 2021-08-09 09:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 89ee21e99bde919b050082764be8307e SHA-1: 7fa9c0c0d31e2f279d2acc0cb144dc787ae7e4af SHA-256: 1292c0d90820472a1f7cf7bb8f82dc1f78d6c3dc78f97b4c459f68688025506d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised or disposable hosting, suggesting an attempt to distribute malware or engage in SEO abuse. The presence of a 'download button' lure further supports a deceptive user interaction pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://stilistspb.online/public/files/uploads/files/85755582989.pdf In PDF document text
    • https://blugarden.eu/file/katepepode.pdfIn PDF document text
    • http://vina2002.com/uploads/files/moduxejez.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/fekazovidapolagarigovax.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/44680924547.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/borarixapabanul.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/37541851123.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/21995342517.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/12354775461.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080f6addf76d---reperepevofonajadugokuj.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/7f38b7963cec10e393ee3f399383e317/xorejerovovagik.pdfIn PDF document text
    • https://museos.comarcadelasierradealbarracin.es/ckfinder/userfiles/files/zuzixetidulatozewomedete.pdfIn PDF document text
    • http://aiken7050.com/clients/5/51/510ae66c864a6d23552e02d1b5190e2c/File/9130803461.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210809144354.pdfIn PDF document text
    • http://ozona.pt/wysiwygfiles/file/bamimabakodabipowor.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/63bu5dht23edvsr13d9nojdo8e/40541940332.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/8u0nslsdb33khlk735t3pftcf2/lagizalikipigotafal.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/47335391134.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/v23oo6tsbs0op1ukv730557k64/jojalibijowotugubo.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/tomuzosowozilakesumebopo.pdfIn PDF document text
    • http://budka39.ru/files/zitorovam.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/001448dc53f359a923a1bd826c34f6da/91231974501.pdfIn PDF document text
    • http://goopenapp.com/uploads/files/47440101173.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6a91540e7---garutalirekumalizitixa.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be8ff8b0a9---33078354209.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=delicious+emily+honeymoon+mod+apkPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDC 19276 bytes
SHA-256: 6f56072f3e23acae52f179e06d6563a268acfa591d7faa042e0ce55531c876ed
font_01_sfnt_off00011d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7D 10888 bytes
SHA-256: eff278b83c795018fd2a5ab1b5aa0a3e1a47f8ce1c0768f7b21c74257d8aef0b
font_02_sfnt_off00013682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13682 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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