Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9c63d6e2f2c61c…

MALICIOUS

PDF

95.7 KB Created: 2021-07-18 12:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 83605998e7bc130727b86c689a558c94 SHA-1: b3cb9a3ec0721556fb8d922a252443efb6ad3926 SHA-256: ba9c63d6e2f2c61c3c8b60e7c1334d7e954fce854294c4c5fa302cdba6e10b65
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other potentially untrusted domains. The primary purpose appears to be directing users to malicious content or phishing pages, likely as part of a broader attack chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c99769e7223---panefofonogidat.pdf In PDF document text
    • https://tyko.pl/userfiles/file/92259660635.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/zawaw.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/b05ac60832ca753aff6eb090be0e34d9/noxorilabojuj.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/gesutokodon.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/f3s3oatudnq6ito3c409qfm8up/56652013243.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/93023130149.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/54659086746.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5015d295f---53141962893.pdfIn PDF document text
    • https://sce.tw/uploads/files/60ee5f65bf98b.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160771fb64ffed---39703713116.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/6kebp0hpk6qdvhkg77rb3k4926/14763122758.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/ad8912cfb86aa9a0f19a30a1bc730acd/12456441996.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/767f3618323a4f909f9cd3c29dedd25b/sidixomo.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f3ac83434---jarajonulujiga.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ee81dbb5b---14945621970.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/a2405bf44dc0f5863ccb85b7f923b845/85074774052.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/f7870bdf124000421b84f0b1ba903657/1427622192.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/98791530710.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/9918920568.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/0ac7cff0be93b6e5822e96d411bbc5e6/75827550427.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/8b572485b361c80d59ae9325bc812ca2/jizupomofiguxal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=nocturne+piano+sheetPDF 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
font_00_sfnt_off0001054c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054C 2632 bytes
SHA-256: 73d18d3df3a55c596387aa2bf06563c1bc847fec976e75d990d444644dce34ac
font_01_sfnt_off00011081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11081 10500 bytes
SHA-256: 69cbfd38895dc516381a592e28518cca74a2828baaf00af18811d9f3032841a2
font_02_sfnt_off00012858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12858 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001406a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1406A 18768 bytes
SHA-256: 7db15b5967f44216e94b5f57a2cc22094336d2f0c1420aa13a633a1df240a24d

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