Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2cc9274699a78c…

MALICIOUS

PDF

69.3 KB Created: 2021-09-07 12:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dad3ffa0903762dde00a0c06bf552035 SHA-1: c25313e8720dbd2c1b11be2b6fda049a2c9da82c SHA-256: cc2cc9274699a78c1f562dd389fb64957c799cb9b9071ed29b8965e4fcccdcc9
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It functions as a link farm, directing users to multiple distinct hosts, many of which are compromised WordPress sites or disposable hosting. The primary purpose appears to be to lure users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/5e7ced8b40f93d310595e0a9f17b3b7f/zejupavototo.pdf In PDF document text
    • https://biographiewerkstatt-singer.de/userfiles/file/tufonemigafemujutuda.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/91482503524.pdfIn PDF document text
    • https://digireg.se/upload/mevoveginogizagimokud.pdfIn PDF document text
    • http://bellsazshihtzu.com/clients/878694/File/29223657992.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/rutufizoxa.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb124b58adb---pemowakabagapiposeteki.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/jozizurobitasuburaxa.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41e9b75a56---lifeduwatufidukuketosok.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757f8a8a003---21752220625.pdfIn PDF document text
    • http://falerisztika.hu/tmp/22113848907.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8019982c6e---42057998364.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c9443b2966---gifodepabanotetixuba.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/86e4434f83bc3d1e475a1895516bc954/tepitowusibuzu.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc180224f1---74051735962.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/2198d792e25585ba1b62e76362f97ca9/natejubemuxo.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c663b2e646---52156574283.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/07c2aa9ee043e7a3458401451e2d2faf/lulerujedibud.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/85723870297.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/33ac0b5c4dbbbb138ad1f652190b9505/zikupevakaxowezokixak.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d39a2e5f908---lederexifijewibilogate.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/vetamom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=differentiation+of+inverse+trigonometric+functions+worksheetPDF 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_off0000b182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB182 14528 bytes
SHA-256: 90e5bc8c515f42bd78a9de76367e6d4bb341f3d25736976bed5ec84cbfd81a00
font_01_sfnt_off0000d5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C8 11084 bytes
SHA-256: e332466f9b6a90e44430f4d76fc5e0972378de7fe08c2ae82a0db2159f7941eb
font_02_sfnt_off0000ef94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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