Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a699e9f98ebb11b…

MALICIOUS

PDF

67.6 KB Created: 2021-09-26 08:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 696b0d53b2d2660b5283bf193d878c1b SHA-1: b9787ee1523f1e2a2e4669ebd66c5bb23423eaf3 SHA-256: 9a699e9f98ebb11b6022e653b0141c9e7f352dec8f7e85ce23acebad21238611
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It contains numerous links pointing to potentially compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing pages. The document's structure, with minimal text and a focus on image-based content, further supports its use as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/b046bbaa3390078c82ce789388e7cffe/17337502520.pdf In PDF document text
    • https://latework.cz/soubory/68482494514.pdfIn PDF document text
    • http://magiepourenfants.com/images/mediamanager/file/kositasesijadiragunolefep.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/kefomabu.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/punobixeza.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/pinuzixasuvotemegiwemiv.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/70038299661.pdfIn PDF document text
    • https://narellesastro.com/userfiles/files/71321548700.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/bogigatemaluxudow.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/rixeniwumibub.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331f333477a---juraxof.pdfIn PDF document text
    • http://radiosalsa.fr/php/rs/filesupload/file/72923786140.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/pavuwezunaz.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/cfcddf12e97b42ab038307ddc0004d19/jakelelokubosanadelol.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/fodepakorepaba.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/20387663356.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210906214650886.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/fojobitoj.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/safere.pdfIn PDF document text
    • http://internet-trade.eu/UserFiles/file/68383545209.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/41186945661.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/47854357381.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+do+you+take+screenshot+on+androidPDF 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_off0000ad2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD2C 10804 bytes
SHA-256: a850cf8600b923bdae6b4c0b876e080686c57046d2c130eccf5479edf914e025
font_01_sfnt_off0000c612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC612 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000de24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE24 14044 bytes
SHA-256: b061db6a7340b52cd2b89e622a6d22909a92714f84e14aa985dff1ddd476024b