Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba4cf294fa4a445…

MALICIOUS

PDF

69.5 KB Created: 2021-09-27 12:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2100897eed32f37864ca9933f54d97f6 SHA-1: a02155cf1c34a024d8d9ac44d1b21a4a49d2baf8 SHA-256: 7ba4cf294fa4a4450246213f0ee40ce07ef30a42f4831d72dbf48d1c0f93c8e3
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a high density of external links, many hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The PDF_IMAGE_LURE heuristic indicates it likely presents a screenshot to obscure clickable elements, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 69 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://culturasiapamplona.com/guiarte_userfiles/files/52128761860.pdf In PDF document text
    • http://makaroma.fr/upload/file/39928392851.pdfIn PDF document text
    • https://beleznayauto.hu/galeria/pictures/nuwisuj.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/55760927926.pdfIn PDF document text
    • http://wish-pharma.com/upload/files/2609201098.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/10237142686.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/32104058434.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/d8ed1538229c4b70a8b114312ef2fa42/dijafobakaxegumisewukose.pdfIn PDF document text
    • https://nezamirekhaseafoods.com/userfiles/file/sedelonifolowixipajovuni.pdfIn PDF document text
    • http://synhbio.com/upload/files/pejimedowupolosubelosoniz.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/xozudebi.pdfIn PDF document text
    • http://sql110.com/pic/fuwilesu.pdfIn PDF document text
    • http://klenderbio.com/upload/files/98262940331.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/57378696833.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/banuzen.pdfIn PDF document text
    • https://inprovitcolombia.com/ckfinder/userfiles/files/zivupanal.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/xapamemoditonubegod.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210906_798447564DA3BE25.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/a6d4c7dbd1909775f9cd40835a228281/derokititobebobaxejokaza.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/megisuzinolilewewakak.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142b616c351f---51942427112.pdfIn PDF document text
    • http://ablerexthailand.com/userfiles/files/62030560527.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/mitovuzedefinowawitizolaw.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/45258891539.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141dcd441a96---64543857703.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=nothing+is+getting+downloaded+from+play+storePDF 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_off0000b3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E7 11124 bytes
SHA-256: 0cbb56b0b7c5bd5b2f8107535084b02ffd1983842d1116b6306c3a727e52038f
font_01_sfnt_off0000cd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59F 13900 bytes
SHA-256: 6f10248d86084ab337c453f85393143f17d2a2f6713fba5b5c9df0d216250d04

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