Malicious PDF — malware analysis report

Static analysis result for SHA-256 202b989e0c18c8b2…

MALICIOUS

PDF

75.9 KB Created: 2021-09-05 20:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 934cadec1dd06af8bca3ed101367c0ec SHA-1: b4122b02df8e1e06926d661547fd4a844bfbd020 SHA-256: 202b989e0c18c8b20efdbe2ac02975e0ec0241b49f378fd322d14535c7322e0a
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it functions as a link farm to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://drafthe.ru/uplcv?utm_term=guitar+full+notes+pdf PDF link annotation
    • http://consulcongress.it/uploads/assets/file/bisuruziwaguzagobilim.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/47692646051.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160d9fa5672d12---49710261759.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/64f48b9a5c50d0212ef700284fbedf61/loziwajagijemajegoga.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/nixuvagovaloladif.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/sakak.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/f536395852a3bd72e703dfeca42b7627/58539324523.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762aea942fd---7548652180.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/7lfteh29ml8gtnn8m58d96afjg/45413816870.pdfIn PDF document text
    • http://vinaaquachem.com/uploads/files/7856825481.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/76454075417.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/zezexozuwir.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/356478750.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/f447bbe6bb1f180c333ad2b77209d9f1/20072337757.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/24514721996.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/g3ibqgkt49t3td1usv9f4o7ktv/xopopi.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5e97315366---2262522424.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/6176q0qoo5hrlicpkphk4rl1uf/zobepuwegitin.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/64726769975.pdfIn PDF document text
    • https://numberonerevolution.it/file/dupikaporonugusuloposujep.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_off0000c683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC683 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9A 10632 bytes
SHA-256: afe3b88110381f9c594ad877fc4837ebc8f4b5813c8612942fa8a1c265e2719e
font_02_sfnt_off0000f707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF707 16968 bytes
SHA-256: 377952976db33aff32c5415c0196be58f3f7f311b5246aac2e1126a58c375098