Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6aa974e8515024…

MALICIOUS

PDF

90.2 KB Created: 2021-07-03 13:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bdabfd79daa9c1b40f94c154a51cc98f SHA-1: 6d82e2adab00ef9c1711f0e2c112b1f18466f65a SHA-256: 6e6aa974e851502431ddde164b1d5740a14a7f3ac98b809cebb67abddf6a1932
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Multiple heuristics indicate the PDF contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and URI heuristics suggest it may leverage embedded JavaScript or other mechanisms to facilitate these redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/72812da3bfa10a952dbfbb674d588275/31949784308.pdf
    • https://calmoinc.com/upload/editor/file/mefuderinedimerolitomu.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755e7b3630f---30992597124.pdf
    • http://dgjst.com/upfile/file/runawemenerigaj.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608598fcd22de---zemapenuxazotimexo.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9274cf2edc---jejuguxidelal.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092272610574---1990464584.pdf
    • http://myphamhelios.vn/luutru/files/22112531277.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609873b777201---18537765099.pdf
    • https://stillwaiting.org/userfiles/file/99128063756.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/l88r19s58f4o0agmi7to3sp4pm/69873803566.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/7vv6qr0ir7sseaq28k828jmnim/rimosovoxaxanetamep.pdf
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bebilakosusizefopom.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/c54a3424e76834d692e3ea2e3490a4d2/jivud.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/2febd47ace7f5aee74483bc85868094e/31053231603.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/tv5cqvgv9av0vinbn0nohvr7of/1079685526.pdf
    • http://project-lovcen.me/userfiles/file/74786116549.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/qlbna9e0nbdbvpn9bomd9vo0b2/75681110108.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ibr45ie3mj4hd2klp1g1im14e4/wulagu.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/agkt1bbkvpbt58ff3uo7gcsqk1/26408921162.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/081ft43dcsi5pml39ug9flmgvi/9098096755.pdf
    • https://amitadevnani.com/userfiles/file/pilimuluwibapewi.pdf
    • http://studiotecnicodavico.eu/userfiles/files/25156235105.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+set+up+ethernet+wall+ports
    • 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_off0000ff5b.bin
8321de7fea36a2eb22e291f06377f9265614083c6f5c65078b6dd378efc48666
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5B 16968 bytes
font_01_sfnt_off00012b9e.bin
09ef903aa8873a5ae9f840287da2ca9f3f6772f3d8f1f6e4702bccb65d74da73
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9E 10432 bytes
font_02_sfnt_off00014347.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14347 16792 bytes