Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e5c463202c94b4…

MALICIOUS

PDF

68.5 KB Created: 2021-09-19 22:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 22185a3775fa97bc2359d0831400197d SHA-1: b5104adab2cdb6d767dc502fd1d38fc02da99abb SHA-256: 70e5c463202c94b404c6cdf192605596a4d2680511e422da40cb17f72b96c0dc
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. The heuristics indicate it's designed to look like a legitimate document but directs users to external URLs, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://metall-press.ru/files/rupekutuj.pdf In PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16142ec94262dc---bakapatozeka.pdfIn PDF document text
    • http://the100voicesofgospel.ch/fichiers/newsletter/file/zuleravi.pdfIn PDF document text
    • http://food-cloud.com/home/food-cloud/www/site/site/data/files/xuwisubaves.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/41278864798.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///gidofimixerak.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/88657339843.pdfIn PDF document text
    • http://makairways.in/home/makairways2017/public_html/dowalumniusa/ckfinder/userfiles/files/15212192132.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a52f40e0e---veratuda.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/xakavagexumojeniragew.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/26375481612.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614474da44da0---lamame.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/kiloreruz.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/jeripel.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/buzijojep.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/dbadcab327a3eca3f64ef3849cbfbdc3/luxofafimepuboruvedap.pdfIn PDF document text
    • https://4cmedica.com/ficheiros_upload/file/94536128119.pdfIn PDF document text
    • http://air-ned.com/uploads/files/zuwojunaxegafesagokute.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/21504958880.pdfIn PDF document text
    • http://rpsbchamber.org/editorData/file/mapolavelogetuf.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/32927970317.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380bc86eb51---xotelif.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/31019718143.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/latikedama.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/fobazafizefalinofemaw.pdfIn PDF document text
    • http://dakov.hu/_user/file/sufejogitopuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=download+firmware+android+9+piePDF 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_off0000b174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB174 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98B 10648 bytes
SHA-256: 9da8e400bda61af580cf8b765618d16da1ddf1757985fa23bcf72670b6ff9193
font_02_sfnt_off0000e1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DE 14024 bytes
SHA-256: 0f43019c189860462fe35fc92a16f04948acf45b77abbc069deee0b23d510368

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