Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d14221d14d12e9…

MALICIOUS

PDF

80.7 KB Created: 2021-09-06 08:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9be9724206e2a50b75223d45dce1d610 SHA-1: c6e86e445a90faeaede97bbe8d2965e234582dd8 SHA-256: 80d14221d14d12e9b22d61a39819d976f25330bf0c050c937da2836f7488c0a4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The heuristics indicate the PDF is part of a link farm hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/66497017666.pdf In PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99586309014.pdfIn PDF document text
    • http://eaupureinternational.com/userfiles/file/17935616183.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/28495415350.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1lp5ole9bt732fmnjlcvh1cvp6/74747062980.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/61980273562.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb1199d958---tebusexupiduwoguniwu.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/84a9d481e31f0c8d957949d332395e42/29249538673.pdfIn PDF document text
    • https://granitabrasive.ro/editor_up/dupuziganavijidutogo.pdfIn PDF document text
    • http://msamericapageant.com/clients/873634/File/sibimidolaxi.pdfIn PDF document text
    • http://klubbelgickychobrov.sk/editor_uploads/files/9591755171.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/55414078979.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/35engf2ghpfbd261ft8i7h6as4/54667976414.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/denikasagajusetodix.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/napezazovupofiw.pdfIn PDF document text
    • https://people11people.gr/uploads/File/darosenimelisofoginanov.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/e5e185f7b6debfe43cbc750ba1c015b8/11994962261.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210609_D66F9861DEEB6506.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/10509260922.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2d53061e7---siwenagokiwog.pdfIn PDF document text
    • http://rewitex.pl/userfiles/file/98350201478.pdfIn PDF document text
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b3876de18---nuvavorepebejugesipe.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e68778e2ffb---72054410295.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/17565177600.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/34465767189.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=minneapolis+map+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BA 10456 bytes
SHA-256: 903edc8317aaed28008566bb0df87a44e9938e0cb96ff103fadc4bde3d279593
font_01_sfnt_off0000f15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15A 16952 bytes
SHA-256: 0a5a9fc816325068b038e9317c98125873895d652bce015e6cda2d5d227698bf
font_02_sfnt_off00011d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1