Malicious PDF — malware analysis report

Static analysis result for SHA-256 056c0dc801fe3583…

MALICIOUS

PDF

82.1 KB Created: 2021-09-19 04:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d8a8a00df9a43a5fd03aac9e72f95124 SHA-1: 6afadd9fbec77f37288d62833d075d35e0f0fcc1 SHA-256: 056c0dc801fe3583c2cb128590a15224f9e5588f32a4399ef2b649619efe51e0
156 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://mimpishio2.com/contents/files/besal.pdf In PDF document text
    • http://wedooverseas.com/userfiles/file/fagopegetopozolan.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161301a1dc318f---totirux.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210906_61D3BB64447D35CF.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16141ffcfd83bc---tedafawazibuzowu.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/81231933970.pdfIn PDF document text
    • http://cartopack.be/Images/file/ditaxupokazadatajuvivalu.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/soziluwarenavotivimelof.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210912172059_bpfhvn.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/tapuravenumunubinex.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/dikekoxizene.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///womevutoka.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/79233201569.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/dewuliwafov.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/rijiderabaguximetuku.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/654g6ulf19nm6ndtkqknmpgou5/woworiwizujuwupiwizepilum.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/0d8f05901a39be2101ddad676ece4d78/fivigituravapu.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/rojopojenu.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/womoduzepedasofikinipenax.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/45569487391.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e36fc154bd---lobajaribiwoz.pdfIn PDF document text
    • http://lnv-cnc.com/userfiles/file/jemab.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/161338412e99a4---gonopabe.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/badefubuxarezotino.pdfIn PDF document text
    • http://swhos.com/upload/files/sonuxafulige.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=jak+nagrywa%C4%87+rozmowy+androidPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF508 10628 bytes
SHA-256: d61d9e924b84f6e1df95b502166c772a3fb1bbd5fb2e8852e10742fe059cfcba
font_02_sfnt_off00010d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D36 17288 bytes
SHA-256: 2b1c424d4f20d6929b523faa4e6aefcde17feed2ffb411c8a2146cff1b6ed1bb