Malicious PDF — malware analysis report

Static analysis result for SHA-256 11100b5e4b92db2b…

MALICIOUS

PDF

68.6 KB Created: 2021-10-03 01:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 2a7f09542cae55af7b6b5eb95f0641bd SHA-1: ed96ba4f3c73ea8a5d920125eb5c2d1c709a21a2 SHA-256: 11100b5e4b92db2b46b35090665fcb7004ffc7ff46c4c20b0587e9b3fba2a275
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 appear as a legitimate document but redirects users to external URLs, likely for phishing or malware distribution. The ClamAV detection and ML classifier strongly support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 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 https://huntic.ru/uplcv?utm_term=witch+hazel+and+hair+growth PDF link annotation
    • https://helicopterleasingservices.com/userfiles/files/86262431952.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/93175678827.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/91529901060.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab67072e48---77995084955.pdfIn PDF document text
    • https://adminico.nl/userfiles/file/37015727688.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/keraxobaxudotafefomu.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/91442100856.pdfIn PDF document text
    • http://jcpingie.be/public/files/fopatonibaxujal.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85254121257.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/kulugosomalunomivuwen.pdfIn PDF document text
    • https://ijpdua.com/contents/files/2757487631.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/lopoxudeveju.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/damigelinutojimabugox.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/bomitigulelelenuvezofud.pdfIn PDF document text
    • https://fabriziochessa.it/userfiles/file/58489325737.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/detexasipepuzurikapo.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/tiwigimoredoreruxov.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/xugiv.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1614d8471cf37b---74550582685.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/sadifoduninajopinirid.pdfIn PDF document text
    • http://koutingchina.com/upload/files/87040212603.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16158aeca79d3e---xojup.pdfIn PDF document text
    • http://upsshop.ru/ckfinder/userfiles/files/duzedoluzoxozonilibit.pdfIn PDF document text
    • 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_off0000b102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB102 10620 bytes
SHA-256: f1095553e1b27ff31642499916b70660b92d0d275608fdd0184c977ab4fda6b0
font_01_sfnt_off0000c919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC919 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12B 14224 bytes
SHA-256: 93597b1a012cb27afed3b967fe28ff4604331ef6eea3905d9b88c4b707281fe0

Open this report in the interactive analyzer, or submit your own file for analysis.