Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc0cf4ff37b57d0…

MALICIOUS

PDF

154.1 KB Created: 2021-09-06 04:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 41dde7c75b5b37140442532d76975588 SHA-1: fd3ebbbfd14cb298f33f29a021c79193eeeeb9b4 SHA-256: 2fc0cf4ff37b57d0072b1bc9d6348224ae83ea79845fb986b44965322065fd2f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attack pattern involving redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9457

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 http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da43f2391fe---23426192029.pdf In PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f109d34384---kaparusomidelira.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/24026320350.pdfIn PDF document text
    • http://arcadia-fitness.es/userfiles/file/farifatejafusutaza.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ta0v2dr1vghooq8rlfvi1ed8rq/16589689231.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7fd07f4da---kawexeruvavegof.pdfPDF link annotation
    • http://axi-hohenstein.de/userfiles/file/53733683358.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/durose.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/jevazarekoro.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/furapobasinarozipajeb.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/xareratusunepugabijix.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/munidagoropaxefa.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/15543609227.pdfIn PDF document text
    • http://braghieriarchitettura.com/userfiles/files/dijojuladavagi.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddfc0629b99---3198947677.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/jaxigegenodeterazatulego.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/ki35b266lcbdp3b5he3gh3sd2s/wojegene.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/mivomasu.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895cdb9c422---99131240253.pdfIn PDF document text
    • https://rajaunited.com/contents/files/suwoxufaxazaxade.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/0derqrrsleu0omde7n1dtqh08k/wuzolezefat.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086264bec981---xovirawidirilinivenabilew.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/72f03cd7475733cac72431157b8548d4/kekemuz.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/buvegafi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=la+guerre+d%27alg%C3%A9rie+cours+terminale+pdfPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C5D7 16676 bytes
SHA-256: 01f079347fb17fd78b91c95b72e4e2efaa3d5d0aa4325f14ae6c2c267b2cafaf
font_01_sfnt_off0001dd2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD2D 25668 bytes
SHA-256: 9c58c1a810c4253a4e8a9aaa7c11c48e73d380787f4b4356e0f6a8895806b568
font_02_sfnt_off00021cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21CB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000234ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x234CE 11208 bytes
SHA-256: 6761fb136c7065f83b219181b5abe1f99d2e6f6b37edd66cf0d51efe490c3b4d
font_04_sfnt_off00024e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24E81 1888 bytes
SHA-256: 228445a3744f13af4bf84041e55802a923554d86926eb0745489ea117e4ab105

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