Malicious PDF — malware analysis report

Static analysis result for SHA-256 719001c67964839b…

MALICIOUS

PDF

74.9 KB Created: 2021-09-04 08:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ca74beddf1b00ada227d7c01d83e2b81 SHA-1: 96a72c142c58db02bf4071c78aaa90c6f2cc6c8c SHA-256: 719001c67964839b26ce802e3038e111abe318b249e537f76add515e5c77fecd
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to malicious content or exploit vulnerabilities. No scripts were extracted, but the structure and URL patterns are consistent with a link farm used for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

Heuristics 6

  • 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.
  • 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://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16110b437b972b---batapoposopawifewivizexaj.pdf In PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bdf42fc6c---pulesotimarokilivefag.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/0a9dc3ac7f1d4d775b0d4075a2c88d9f/50543588267.pdfIn PDF document text
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/ketokesederuwamisijaboze.pdfIn PDF document text
    • http://simonide.org/userfiles/file/tesowulameparikomilaname.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/9752ef71dfabc602a3a80a18865eeef8/77356547344.pdfIn PDF document text
    • http://3dsami.org/uploadfilefiles/16045618029.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/sozosogeponigiro.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c4683927a6c---jerogamofa.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/820da3f02341559f05112df90fc78622/jufamelamodipiv.pdfIn PDF document text
    • http://fisioterapiasuzzara.it/userfiles/files/15340442636.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/fubapifiwatetuloziluwo.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/4423151869.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/sudixonumirematuzo.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c736784f3c7---72292832584.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/932b6338c5aead25b7826f8cc1888a80/71443436887.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/892a9db0b6fdaa876bec8f4638476d80/56679101637.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc006ef04a---lududopekobubakamelefeg.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/afa76a8fe391770b55ffc64e8bb9423d/pitesimekubevokunotibufi.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8600df970---64504856198.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/30195574307.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/66961895823.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/i87fh65qfd6uluajnbp7r4fnf1/fufunexudajonabirek.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210826_DDCAAE8EB8FD27CC.pdfIn PDF document text
    • https://viticoltura-enologia.com/file/jusemajimagitukesipide.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/9f9a9194b25c5005e5c745da2464a689/rewufomizogulifolasiliko.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/fofuxetewu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=apa+style+sixth+edition+pdfPDF 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_off0000c3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3AA 10692 bytes
SHA-256: 2ec926971ce797bc94a380d07e817cadbbddb3582a2be8775c2e5943d5161c9d
font_01_sfnt_off0000dc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF450 16204 bytes
SHA-256: 618d83caa3a185c04e88cc27187d579658575d0049c98bb707a6f61a7f4c08d1

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