Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac69ec1bf6fcf2d…

MALICIOUS

PDF

82.8 KB Created: 2021-09-02 01:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e94958cdc070db9e430e7e58a714e83f SHA-1: 6ad324e3188ee00e082f1526c3266dbc9685bc30 SHA-256: 2ac69ec1bf6fcf2dfde48e7f7e160eabbb993d5d45a5e17be259906d1d5e9a64
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/4cnlh76qrfsdd0nq1p9f5h3lt5/4882989572.pdf
    • http://gibisch.org/files/files/zezumobasopinemo.pdf
    • https://seikai.jp/free_images/files/95934940775.pdf
    • http://antoniolescio.net/userfiles/files/nozepireva.pdf
    • http://youandisagenix.com/ckfinder/userfiles/files/90630363764.pdf
    • https://abofahed.com/userfiles/file/kolotibixe.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608954975bf9a---fokafolenimedej.pdf
    • http://www.cenlafilm.com/siteuploads/editorimg/file/gisoboxuduzawitesenuwage.pdf
    • http://www.smwiarus.pl/ckfinder/userfiles/files/bumovifalosabitodezixovuv.pdf
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55877043802.pdf
    • http://www.nomorcantikjoss.com/file/kerexikakasu.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c963b59de11---kubuxexaxuxutojugodadif.pdf
    • https://ecotranslation.ca/upload/editor/file/naforepirigoxilapufibo.pdf
    • http://georgekoldun.com/var/upload/file/88312764819.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/595e18a2878fd8b7cf341add47d46180/jolapigeruki.pdf
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/84733582278.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607a250e64512---pimuvibuvizofikonas.pdf
    • http://wintec-samu.hu/uploads/files/9507065751.pdf
    • http://rfamilylucas.com/clients/73238/File/nufofizijigigumuzem.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/cft2qkm167mi3sf4n5rh3m97ve/56954002643.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/a4806a67adf6d164d7cbeca377e20754/fixabakal.pdf
    • http://novussiteyonetimi.com/uploads/file/vazinipiditalegimikopu.pdf
    • http://simsoncantho.com/userfiles/file/divoguriniluwexudanedunem.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=can+you+have+oral+herpes+and+never+have+an+outbreak
    • 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_off0000dda6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA6 16792 bytes
font_01_sfnt_off0000f5b8.bin
edec3d2d81926db8119412fd6b1b73c23b76f8533d8b4af6f800261f81c1febb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B8 17304 bytes
font_02_sfnt_off000122a5.bin
bf1abd526c0c8e5a01a1809cf921fa59a982d13b5a07204ceab3de43fb8721bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x122A5 10940 bytes