Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd591289eda54974…

MALICIOUS

PDF

98.4 KB Created: 2021-08-15 16:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 06dff7a32f52003c612abb7890a1ca15 SHA-1: fdc48caac905ee795cd20a11931fc9a80fc8c749 SHA-256: bd591289eda54974563b7404023b2351d6390098c6e36d4766b14ca8a5569f9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish for information. No scripts were extracted, but the presence of multiple external URIs and the overall structure strongly suggest a malicious redirection or download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://e-fasteners.eu/media/file/47347876223.pdf In PDF document text
    • http://horlickhigh61.com/clients/a/ab/ab3fb267cc30d45b98f460a20cee0b8d/File/xozobupakovarudutaxufumor.pdfIn PDF document text
    • https://laps.pl/userfiles/file/8853392204.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609271df94845---46182793333.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/popadid.pdfIn PDF document text
    • http://dietetyka-24.pl/images/files/33637509851.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/podozaka.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd871cc3d8---44099493267.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/dunuviw.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160f114fd52f07---71365403560.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d253d22a3f2---90816797006.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/9203eddc008d902a2a8aad1b82dc51b3/99342008840.pdfIn PDF document text
    • http://eis-pieschel.de/UserFiles/File/zirerapuxaragajok.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/cbd4ebe6a22c316184715af2c8d6633f/sukovudogorewesu.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/875f09d32fa4566bd6e713fd38dcddd9/kitisenivawigigupizenewa.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611855b2d0688---dozixafigofesusemazasatud.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e4945c9c6---zekukefetejar.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c324396ab2b---91489803854.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c5016bc7455---30231639224.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/8986634923.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/lsphu04mmqo8tgjcc82bnf8j56/84635147417.pdfIn PDF document text
    • https://robertbah.si/files/file/22725054193.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/d60fc2d990c7dfc155ab7cce5bdbe20b/46584604663.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=triangle+congruence+overlapping+triangles+worksheet+1+answersPDF link annotation
    • http://irodori.kir.jp/files/file/nakerilixegazaj.pdfIn PDF document text
    • 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_off000100a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A6 16224 bytes
SHA-256: 7d021a1735e72e2d4fd16d1750f0e82041cf66baca08667ccfe38d67c512953f
font_01_sfnt_off00011680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11680 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E97 11012 bytes
SHA-256: f448c054b0b8bab5bb34865efc73407b5b599bca9af843cf430a7cbe99e70c39
font_03_sfnt_off0001483f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1483F 19052 bytes
SHA-256: 5db045c21cb0ffee5091c1d3c91692a4658b0f4bbed1a5cb4352cc264e44c0a0

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