Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2027405789ac071…

MALICIOUS

PDF

87.9 KB Created: 2021-09-07 01:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5a1ff1cc9d13f0010ac9a98b185259a8 SHA-1: 927ebfd8f8eefb192ba71144c43144e5ec29edff SHA-256: d2027405789ac07155126ca7a669f553fa7473f59ab5965cba23428c929eaf7f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate an attempt to exploit users through deceptive links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://queure.ru/uplcv?utm_term=gillette+fusion+proglide+power+or+manual PDF link annotation
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/j1u1ufal6i8ep34j12j338p5ab/vudaguluwujovinu.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/22436657918.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/44765138911.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/zabajakibodikekup.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/1622fd4b4ddd17658c931aa90f886b53/vebaxudaposekevawa.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/80493544625.pdfIn PDF document text
    • https://gamasteel.net/userfiles/file/23689858759.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/a8c5410061eda80e30d222cf31148eec/laloxegojigofafazow.pdfIn PDF document text
    • http://carmakers.cz/userfiles/files/kuxiwelugej.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/wadurojap.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/dd334d3d536b1f15a87b478c563b0de2/41063879773.pdfIn PDF document text
    • https://mccartha-cobb.com/userfiles/files/finisitorunosaketelezoma.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/97561591166.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5fae2581f5---kumozosajizorela.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/11581322628.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/bf500f287d689896d7f63e224290612e/kenawimopaxisav.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/96605962397.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/7119788223.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611a8d3561a6a---92848408807.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160762998e26ac---12825654534.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121aa9175015---63258422770.pdfIn PDF document text
    • http://henrysadiereunions.com/clients/876463/File/tuwofewikediwawigudegax.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/77741078683.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_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001042a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042A 11064 bytes
SHA-256: 9e738d60d4f0c00b12e9eb0b3bcbe748249f6d277645b8771f45d749deb94608
font_02_sfnt_off00011dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC7 20036 bytes
SHA-256: d3a9ef18c9c56575a2682e2b3c9385a24e199af6b3f53fa251ba3b7e57d035e6

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