Malicious PDF — malware analysis report

Static analysis result for SHA-256 580a3c4b11415ec4…

MALICIOUS

PDF

124.3 KB Created: 2021-07-25 00:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1ce1fa7130a0b8ba5fa08ee70e966f24 SHA-1: 4c91bb21f2c008fdd80a7c7628e6d3d5944e530d SHA-256: 580a3c4b11415ec4d645462db2eb72063e7442efca5a9a99deb408a2badc57ac
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers flagged it with high confidence. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload directories and disposable hosting, suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and URI findings strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/7gtqggmsneknau33sr1gkor1ru/wixirupitelezomowuretax.pdf In PDF document text
    • http://giftboxvietthuy.com/upload/ck/files/35972953625.pdfIn PDF document text
    • http://jakebenmd.com/clients/0/0e/0eef9d569b11303d075d19626cc6f958/File/74893778765.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609832b59664f---83530841534.pdfIn PDF document text
    • https://oliogalanis.com/file/22192017742.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6343ab423---68962372438.pdfPDF link annotation
    • http://angelojrobles.com/admin_initial_test/userfiles/file/70905962721.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/ed3e56f1d9177db9ca0387ce460b639b/faxivugapa.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/82184000299.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/57632470883.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/pemuvavozasizigadiganiz.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/e49a53b6d505dab003c5e2ab60de9d96/xuwezovetidibu.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/45549444815.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/fizikatojizunugutivopi.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b67cca36267---felig.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b510ec26b97---texutepa.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/lt65c6jgp671iaafugg0cogco8/62355705165.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/9d2be14ca496ed3debbcec65a7b9c811/nawerogi.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd12f0224e---fimomubebodewo.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/6fb4924c4cc736f780725bc37a08a972/76288610225.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/92103311dae7118667d0838ad85e88ff/11449664225.pdfIn PDF document text
    • https://banghenails.com/upload/file/kagekesavebaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=%D9%83%D9%85+%D8%B9%D9%85%D8%B1+%D9%84%D8%AC%D9%8A%D9%86+%D8%AD%D8%B3%D9%86+%D8%A7%D9%85+%D8%B1%D9%85%D9%88%D8%B4PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001a5d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A5D4 33844 bytes
SHA-256: aaa8b2a2d9b7fe663a531bb2ab617386a4e6b148845a81518ef052d0b080ba19
font_00_sfnt_off00014cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CC6 8984 bytes
SHA-256: 1155eef8b03fb48db8196c62fe92ea0367c3129ef5e52290f3da045cb9446085
font_01_sfnt_off00015ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EF6 19008 bytes
SHA-256: ed99db0bb5a93c80cf338aa8f2e531d63670cfacc56d6ec24719bbc1c07a0994
font_02_sfnt_off00017e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E08 15460 bytes
SHA-256: db4dea27284c2e86ed5b202e492386554e6e2a960ad45a1a5a1456cfaa49b7aa

Open this report in the interactive analyzer, or submit your own file for analysis.