Malicious PDF — malware analysis report

Static analysis result for SHA-256 8612e46fd7a53045…

MALICIOUS

PDF

101.8 KB Created: 2021-07-03 00:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 20beea3c774de2ae4e02264e68fea61e SHA-1: ff0b0ceacc1a91a7871d135518e53f54d4152a8a SHA-256: 8612e46fd7a53045998772c378e884754e07e4b7dde4dfd0e8027906e3a963b0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple potentially compromised websites hosted on disposable domains. The primary attack pattern involves exploiting user trust to redirect them to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/93ee17b8572d364e47f1deebc3e7f1e3/vexuxodaz.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/g45q26j1bv96t8m8gcdo02i5e7/1183888442.pdf
    • http://robertfeinberglaw.com/images/edit_images/file/nutegobavu.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090e5f6964c0---34062298438.pdf
    • https://oilbasaro.com/web/images/ckfinder/files/20210613200243.pdf
    • http://berbun.com/user_img/file/jiramuximepoxavazazogu.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccd44121b18---sudomanigojawidopiga.pdf
    • http://inwallendorf.de/userfiles/file/19377746256.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b004aa7449e---53373591225.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6999b7ebba---89389150740.pdf
    • http://bogelaipigeon.com/upload/file/42193351521.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bbefca3fb90---48553695211.pdf
    • http://mientaytourist.com/uploads/files/genutasojixizasopajixupex.pdf
    • https://angkorphotographyguide.com/userfiles/file/46322953875.pdf
    • https://invest.pl/userfiles/file/gusukukusapoj.pdf
    • https://bacninhonline.com/webroot/img/files/35825327029.pdf
    • http://bitite.lv/media/txt/122/file/52412944393.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607991f30d0d4---47403115204.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a29f44bdd---32191031184.pdf
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/vojosojemikenofokigesog.pdf
    • http://osc-pribor.ru/products_pictures/file/wamutuwikogo.pdf
    • http://sgyscom.com/upload_fck/file/2021-6-29/20210629001202239308.pdf
    • http://feach.ie/images/uploads/file/39489151686.pdf
    • http://motocams.cz/ckfinder/userfiles/files/84873864528.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906ec977b09---42714093192.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805edee89b4---56163553748.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/31e396ceaa3b5f2615b98a42e7e95150/nafulivofusari.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=metaphor+for+old
    • 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_off0001285f.bin
48762f9948c232b9dbad62513276f04b620db98b32062d144217da8646f7bf89
pdf-font-stream PDF embedded font (sfnt) at offset 0x1285F 20012 bytes
font_01_sfnt_off00015af5.bin
871e47bc23af423d45eb614071645a0ad2528855bb6bc820d09c139e739bc3af
pdf-font-stream PDF embedded font (sfnt) at offset 0x15AF5 10224 bytes
font_02_sfnt_off00017203.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17203 16792 bytes