Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e82aefacbe50f6f…

MALICIOUS

PDF

77.4 KB Created: 2021-05-25 14:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 008491f7da3582ef62a071ab4f162982 SHA-1: bfb6606ae4cd4c77336093557f9f8b3e57a5c4f8 SHA-256: 7e82aefacbe50f6fcf5ced88b242db2063d1eafe7cd4ffd658129f7fe30599b0
176 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal a link farm structure pointing to compromised WordPress installations and an IP address, suggesting it's designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to shipping calculations, likely a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d280f9cc57---59180451968.pdf
    • http://alexlunacoach.com/img/editor/file/mobibomuzadidofarur.pdf
    • https://matrainagycsalados.hu/userfiles/file/24908258817.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d1273bd37---16703485507.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/6pa1e8b99j6bv6r2i15b6vcjmi/dinate.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606c732b19916---47329157554.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/0nqgs42eo1rvp93mt8fqo938td/10297797465.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098741f104f9---sojede.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee14756ead---xanebabuwevoxuzumefasob.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085737d58ac8---34465152318.pdf
    • http://akicgiyim.com/userfiles/file/segirefekenivubetene.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71eef2c88d---73865933052.pdf
    • https://aimhc.com/userfiles/file/4260544921.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075aac90da9a---ratesaradimobukosodibavod.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073860d9a4fa---25595266321.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd65a14d14---foxijodef.pdf
    • http://writtenmail.com/upload_images/file/94630540882.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089dbd920820---50470189796.pdf
    • http://assushop.com/userfiles/assushop.com/file/92198573701.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16091775c396fa---mosadedaxit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=como+calcular+um+frete+de+caminh%25C3%25A3o
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea96.bin
790d2851a35764eb957b31a5c83c1183d4f6eef7e859ec739beb671d380cfa45
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA96 5308 bytes
font_01_sfnt_off0000fbda.bin
75a3233143a09b4ddd584c5bd17078ec2b3a674f9022cbb18201179ef8ddd42d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDA 13948 bytes