Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46cacec66c557f8…

MALICIOUS

PDF

73.0 KB Created: 2021-09-10 03:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3196884e8ca7ffedba23791ed3bf5e09 SHA-1: 4729265b97cac93633e0b4e6d0706a9b707edf4f SHA-256: e46cacec66c557f8fc91d220a7ed1ab4803efc4999a7b5140d926b4b2fd79fe5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. No scripts were extracted, but the document's structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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 http://addisonplaza.abwingsmd.com/uploads/files/8112834180.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613050a074de2---56743832874.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/37970d3d20d6dc72fc7d4234a569061c/suwigozabulujixunis.pdf
    • http://crescentcarpets.com/userfiles/file/5835593355.pdf
    • https://khabul.mn/mmpa/userfiles/files/jobawujupexofivegifit.pdf
    • http://mediedil.eu/userfiles/files/580411741.pdf
    • http://hebammenglueck.de/ckfinder/userfiles/files/57885256790.pdf
    • http://mylodge-naoshima.com/images/blog/file/gipur.pdf
    • http://najlepsietorty.sk/uploads/fck/file/11596717245.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/c57f688a2bb76550f7f5a69b687cfc94/83383532379.pdf
    • https://ans5680.preneed91.com/upload/files/sakuro.pdf
    • http://csc0535.com/userfiles/file/20210907214227_knj5tw.pdf
    • http://goksirlambinowice.pl/img/upload/files/bamepasetaxefuposesegafaj.pdf
    • http://dreiseengrundschule.de/files/fodupuketuwixiji.pdf
    • https://stpm-sa.com/userfiles/file/xutuvonavibowimituf.pdf
    • https://emartdeko.pl/galeria/file/bamidogibitodilividuwexor.pdf
    • http://ljsmelt.com/upload/files/54572235673.pdf
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/zunamagazuwagigunojitem.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613180c18e54f---lowuruvasotofani.pdf
    • https://mimzyonline.com/userfiles/file/rotiroguzevopipumujanaji.pdf
    • https://daulte.ch/ckfinder/userfiles/files/32326738137.pdf
    • https://avukatwebsitesi.trakyasoft.com/upload/files/97860642760.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16133b2996cab6---jifejipo.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a02adaf409---buwodezodipu.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/07t8t2mq5md42t00bea9ef0rfu/42491174458.pdf
    • http://sanfrancescovet.com/userfiles/files/dajakanubogezoxafew.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=madness+combat+6.5
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc99.bin
d54c9304d4920310a7b453a42d994dbffc10b096d91cc428533568c49d0f353c
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC99 10796 bytes
font_01_sfnt_off0000d57d.bin
affbe0bfaf375c7d4fef294e4c26fced3c6fd0655fc7267269e17e06a2d1a6e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD57D 16080 bytes
font_02_sfnt_off0000fe1c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1C 16792 bytes