Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29e3c04bec2936c…

MALICIOUS

PDF

159.3 KB Created: 2021-07-07 05:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 6b9d91b0ac9f4b68688d32098455883c SHA-1: 869348dcd168bf8c1e5518f32876da9937d69fb4 SHA-256: d29e3c04bec2936ca3ee62d7204fad1f634739d4ed7bae7d5da430923a3c5b3b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and link farm heuristics point towards an attempt to redirect users to malicious content, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21b1746aec---8848590978.pdf In PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb05dc50ca9---5499678800.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/deae4367a4d6d7bb5387fd80c04da961/77543290423.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/qldrfh449t0pvf67m7e481n7f8/kedakopexizem.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/742bf3013fc1529aaea062e7017441f4/demitewavidowika.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/aa5d232042e71fe2f7f6dfa4ec50f298/bimomuxitovotuzilewaxi.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5911db3b0---35182942287.pdfIn PDF document text
    • https://info-jimukyoku.jp/lot/upload/files/xalozota.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/64967916449.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/4c209565fb0472b553764d6824d71521/36965747199.pdfIn PDF document text
    • https://bajrahrs.com/userfiles/file/83266707836.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b34a4d9ec8c---63163709637.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/2l54cedqddc4tod6pdrn01j346/39861410027.pdfIn PDF document text
    • http://natproperty.com/userfiles/files/47501171119.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/30178186902.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/6kuskcufkfmf3es7aq5ckkq160/83964472978.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/b15ee75186aef5dd1551c4327c7b40c5/21807549479.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/ik0g2ae76bu0eschgra3450q3h/40435311117.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/80853518308.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff795daa2b---sujujub.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c62cb4138de---72987461524.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a4f810818---13791207367.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/13969142370.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/77987589092.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ccd24a1fa---zirisosubaja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=the+god+science+of+black+power+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_off00020e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20E6C 11084 bytes
SHA-256: 598f6dc20f970b08b64922f6f828bcc9b929152a560a5ca65da66d34ab6849a6
font_01_sfnt_off000227cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x227CD 17496 bytes
SHA-256: 01237296bf417ad64e115fd538ab74c8a3a6800385e784903ab14edd8d3a38bd
font_02_sfnt_off00025593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25593 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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