Malicious PDF — malware analysis report

Static analysis result for SHA-256 464d2f7d8fe499d7…

MALICIOUS

PDF

89.4 KB Created: 2021-07-02 15:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0603c9e599e2f1e4cc9c96c63c0ff585 SHA-1: 6715583f4abf375e3f73fe1a07e0921b8ae73fca SHA-256: 464d2f7d8fe499d7fe2ca31bb34cc90a2c803654ee5a690982f1aa1d3775304d
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple external URLs, with several hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure and embedded URLs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://parvazyab.com/basefile/api203/files/35895922365.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609474071bf01---julirudasotelakobeza.pdf
    • https://habibitours.com/ckfinder/userfiles/files/64761682282.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/dae6f52951060770297ba5dadf630c60/lizeg.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/1ea4ee4c26d112934dd82cf0f6106f5b/fokamodedifevekotape.pdf
    • http://gayaarchi.com/userfiles/file/20210618124621.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41f368868d---mufenebupi.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8c2ac1b7a---sixerodowuv.pdf
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/keragopawepuve.pdf
    • http://driver-jazda.pl/upload/file/pemovidesetikidalik.pdf
    • http://myucmas.com/userfiles/file/55528302617.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/emvgpaojpho31usicl397gf0l6/nafedelilarajoteg.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/ucugphvkp8eo3030hrgm56fpnf/77165908037.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbc20ba25f---jujifilobukuvaxisonezonox.pdf
    • http://j-line.ca/fck_upload/file/34233938189.pdf
    • http://nuraski.pl/wsg/userfiles/36416127442.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb9fb2ab23---38188160705.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b779f6b8170---burezinemabosageremome.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d467649e91f---kurewojumumukosotolemila.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c184bad5418---fevizavetoregogitetu.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c49b4f775---lakurazijox.pdf
    • https://zenkenmoshi.info/images/files/file/86490238461.pdf
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/k77t2bfjlt4b24ra2eq3dedsdn/19292652736.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=dangerous+goods+questions+and+answers
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef74.bin
98f17783755fd41edb370f1353a1b6d8241bbcfa0eb0e355926d64f5040bba29
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF74 10712 bytes
font_01_sfnt_off000107c0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107C0 16792 bytes
font_02_sfnt_off00011fd2.bin
184c168554596cb76c8a2aa039b557186719633fe4585c58049c6d6ab0526554
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD2 18000 bytes
font_03_sfnt_off00014ed3.bin
c4ef5768ce1fb1df6fd904a171fbd8df4a58fff614ad8d2d2286e71cc932caf0
pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED3 1892 bytes