Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5560438ff99d1a3…

MALICIOUS

PDF

97.4 KB Created: 2021-08-23 10:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0d2fe43a861b872e5cfdc2fcb9af3239 SHA-1: 1b910dacec3ff7bee3bc93af7de3f740816f1f24 SHA-256: d5560438ff99d1a31fd1632cf0f078d5923192c700661d61a40e71ee9dd932f6
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites, likely intended to lure users into downloading further malicious content or visiting phishing pages. The PDF structure and embedded links suggest an attempt to exploit user trust through a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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 https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770991e7556---73338499801.pdf In PDF document text
    • http://mottaing.eu/userfiles/files/26837647058.pdfIn PDF document text
    • http://chieucoingason.vn/files/97707634650.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc79a99e24---93661744623.pdfIn PDF document text
    • http://walkandwagforveterans.com/clients/9/96/96cc06f6b2a5429c1325f0b535cddba6/File/nuveluti.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/rofakagegowewevebe.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/96157156550.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f69c14636d8---gidememasul.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610f5ade9382b---50093776769.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ce000018c---lizemi.pdfIn PDF document text
    • http://foodchemsino.com/d/files/wibinakekifapewetuzil.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082344f53b09---48568320747.pdfIn PDF document text
    • http://bscartridge.com/pic/10287201900.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/valowuraza.pdfIn PDF document text
    • http://mega.kz/media/upload/files/xepakazubetu.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073a5e4e488e---suzixuj.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/78884264334.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/886a49563257ea9753a4ac8e2a52355c/sewedavabowezo.pdfIn PDF document text
    • https://o-dance.com/upload/files/12113651115.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/vuxokutul.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/466a92d9615b43480d4452e5033f85ff/pixifujulagizitereju.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/71410671760.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/robiririzusujofalo.pdfIn PDF document text
    • http://esistore.be/userfiles/file/nowugijoxodiruwawevesaro.pdfIn PDF document text
    • http://websurin.net/UserFiles/File/22852289806.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/4949961457.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=video+compilation+meaningPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off000150f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x150F6 21244 bytes
SHA-256: 9cd4856101dd048250d6625d16020f525ad06d38a5ef491f8edd64f35fc66b77
font_00_sfnt_off0000ddaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAA 10556 bytes
SHA-256: 64667b6b2c27f3e7b017ee5d9d922095ae83262096342438bb135f722b45e8d1
font_01_sfnt_off0000f573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF573 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_02_sfnt_off000102f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B04 21996 bytes
SHA-256: b8b27ca95b7e85bde90ba48209d5426784f1f8e82fb9cba9f3f8106db679988a

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