Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff34003c2ce22ebb…

MALICIOUS

PDF

68.4 KB Created: 2021-09-27 01:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9d7c805e2e80abd9523cdeb2add37afc SHA-1: 9c4c108b2023ffa1986cb8c5ad335e8754364e30 SHA-256: ff34003c2ce22ebb9a06cd6822f987e5e673f7749319b1828229b55f8b99b071
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, further supporting its use as a deceptive container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 68 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 http://www.espace-hotelier.com/ckfinder/userfiles/files/10596064044.pdf In PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/14068399333.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/lajebun.pdfIn PDF document text
    • https://tectrongim.com/uploads/file/juxejuvuwarex.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/dulowag.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/tinoxagafagixilomaterowi.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/s1h8piiq524ti9qhk2412jie55/78317705775.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/sikibavaditokojexipoxa.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/gafitazigizepajewinela.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/81727538296.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/megazagunivinimapogar.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4e9186c3b---64442138740.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/44942510168.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161482103925a5---mesasabegagape.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/15358287360.pdfIn PDF document text
    • http://another-partner.morefriendship.com/upload/files/96770623511.pdfIn PDF document text
    • https://yellowmangocafe.com/userfiles/file/56147036071.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/j4phashbbk3eq9vlpnbjtmb0er/81323854316.pdfIn PDF document text
    • http://skidubravy.sk/spravca/ckfinder/userfiles/files/mimedogubemesi.pdfIn PDF document text
    • http://chukysovin.com/img-svc/files/kosupobisomofaniwi.pdfIn PDF document text
    • http://minipit.com/data/files/sevavoxapefox.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/dolurigikol.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/m2iq5jo0s00lqansrt8v0ujcuo/45582278445.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=my+bible+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_off0000b228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB228 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3E 9992 bytes
SHA-256: b63a57dfddc51bbb8729d630b686b6f00593e7a752c3c7040bf8d788d66f4dd7
font_02_sfnt_off0000e03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03D 14288 bytes
SHA-256: 6bdc65eaf316b77e1e5d798e3122299cf19028881579ea4a0d4f4e33e444cf7e