Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2bd132bc2322cd…

MALICIOUS

PDF

106.3 KB Created: 2021-07-01 23:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 52428f13af2ce10d66c78f0cab75b658 SHA-1: 7ff9ab76c650d419e7958b6dab2bc2f262fff603 SHA-256: 9a2bd132bc2322cd45bfaa5ee3f06a52a2d709a775919613a0f834f880ddbfee
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics point towards the document being used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/2fc6m6cvmlo927p75ginbjpl07/devifinafipamekinip.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/cena7fi3p244sbkd1p1ga82fm1/50149408197.pdf
    • http://jyjwqj.com/uploadfile/file///2021062216563610.pdf
    • http://akinmedikal.com/uploads/file/79537455352.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/qvdi660r9tir5fie8m82mrbhdb/42314895042.pdf
    • http://bsa.by/ckfinder/userfiles/files/ruwupuxepipojumixukegok.pdf
    • http://akkoryazilim.com/userfiles/file/tizun.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/sevuzulanuxekijufu.pdf
    • https://mariellatriolo.it/public/file/28210204039.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/4018238190254668b30f91986019c814/guwapuromunuko.pdf
    • http://clasesholandes.com/userfiles/file/jidipawi.pdf
    • https://ebooksweb.net/files/file/biwimobesegowobezeko.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/46qc8f0idloiqome4tmnojfto4/lenuvuxuxabarasovi.pdf
    • http://logo4you.dk/userfiles/file/wekeserijukano.pdf
    • http://magogaralbamoble.com/galeria/files/vujuwojowudokuzitis.pdf
    • http://beastyenergy.com/userfiles/file/30609189440.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2902d0f4b7---xepitasagodikaxavudem.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c58ae747a---lebiwepevonofoduwerud.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160db16940a30d---bamide.pdf
    • http://acgroupenterprise.com/userfiles/file/33651303117.pdf
    • https://digireg.org/upload/torovujare.pdf
    • https://caribemed.com/userfiles/file/fovix.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3a9c997fc---87455332551.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/xenuzif.pdf
    • http://allycatering.com/userfiles/59916174658.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=linux+system+admin
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c15.bin
4fdd41a8fc53610e43b5ef3b7e7d80cb6f6624179c658bcbc00518807c151aea
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C15 18196 bytes
font_01_sfnt_off00016ca4.bin
45a9e7bfb665c0d46029717aee2bab60117fd0de8974194a3352756d1ca7e1f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x16CA4 10416 bytes
font_02_sfnt_off00018442.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18442 16792 bytes