Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bfe01c4e9e3dee8…

MALICIOUS

PDF

80.3 KB Created: 2021-07-26 12:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e2b36f74087826b32c30221497bae0c9 SHA-1: a56f77e9ece5bba8b09ba4b9135ae75789b33cef SHA-256: 9bfe01c4e9e3dee8cd23a75abbb8105d8cf1f7692c6b7d321785d538060ea585
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to potentially compromised WordPress uploads and other disposable hosting, suggesting a phishing or credential harvesting lure. Although no scripts were explicitly extracted, the PDF format and the nature of the URLs suggest it may leverage embedded JavaScript or other exploits to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://maytinhtuyenquang.com/home/maytinhtuy/domains/maytinhtuyenquang.com/public_html/images/file/vemidimemaxanaj.pdf
    • https://xanbiente.de/userfiles/file/89689461551.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/7492e459a1829963ca92fe5e16a94e7e/bevudoninoparexogumopof.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/013a2192d0a11d421a9e745d79532c82/39318853049.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/2ho6k0ceo7lbtr12issaktmo22/77368237721.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/fcvv8r9olavobb0a6tdln6giq0/goreseluxexix.pdf
    • https://fallsplat.se/file/35117069043.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/096d0316a3a51e210a5612b70047b282/ruradudotimovuxaweva.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f298a8154---43759027016.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098ba6d44b43---lujesidesesusoza.pdf
    • http://fapannimario.it/userfiles/files/60957341636.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609299c533581---37700103783.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7b4d76710---44295103543.pdf
    • https://birudongker.com/contents//files/tavuneten.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942aeb04b02---93390569342.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/9af3de9bce58c669fe644a59c4f2e761/vemezade.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a038b4624---26949144168.pdf
    • http://altinellerinsaat.net/UserFiles/file/12032763171.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073aadf3c3a7---zavotolegikiwigudibuwuw.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/384f60f85555dcbb536ea6e87df19052/nuzagiwegu.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160f006380c9b7---bumigero.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16073118a4c2f2---xusisiwobanaruwuritat.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16085de9b1ffd6---wizozabagewonik.pdf
    • http://russkiivopros.com/images/FCKeditor/file/vawir.pdf
    • http://fine-trading-knotwork.de/uploads/media/muwowudez.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=kpss+deneme+pdf+2020+orta%C3%B6%C4%9Fretim
    • 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_off0000d415.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD415 16792 bytes
font_01_sfnt_off0000ec2c.bin
155f2f5911cb06dda79ccab10c662d7823d4c8390b021ff760c0bb8fa0d2d985
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2C 11292 bytes
font_02_sfnt_off00010626.bin
ff2770fdca98766614144a3bb824bfb804cf13aa6b1e782d3df20faaf3a20100
pdf-font-stream PDF embedded font (sfnt) at offset 0x10626 17440 bytes