Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa6b2ad3083b8084…

MALICIOUS

PDF

85.7 KB Created: 2021-06-29 06:26:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 835e593d951d8735bd7b3118ee004576 SHA-1: ecf377fa4f51b1101b238da2eda637db9f8186d6 SHA-256: aa6b2ad3083b80840d9ffd18bfe970f06b604fa65b3ff6db734292751d0238aa
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains. These links likely lead to phishing pages or serve as downloaders for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://oniceh.ru/uplcv?utm_term=a+miracle+prayer+that+works PDF link annotation
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d653f1d63---12006631721.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/c16e1308db03f677f57244caa1a9a66d/68742626045.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f6db9dcf1---89068033341.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/gumosidarevejowuz.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/xowakoserigojikapur.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608edd71c1614---68029288849.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/del2to3u369ol6etiv6q0dcdgb/guniwigitune.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/f7cd4ff5299bbc6c2fff98d1c4904866/guxekanemakololid.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/wowedalin.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/t9j9vsl62oj2nua7vc8na7ibrh/xowaxexepekakapelur.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/a7db1ffa411d2d7702ff105bf532e2d1/25963673829.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/xirux.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aadc59c3af8---20320428643.pdfIn PDF document text
    • https://cafesca.net/ckfinder/userfiles/files/tujuzusabegugudube.pdfIn PDF document text
    • http://straps.by/ckfinder/userfiles/files/jinole.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749ad22f851---43434349234.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/9k3ksfpfmodrb9v9afognbc5l5/51326656658.pdfIn PDF document text
    • http://cutskytools.com/d/files/larovapuzidoketiro.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/tetulamubodiba.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/59829114814.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/17403536546.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/q9ubovt51fagfq8l1pio2ug7ca/3855241454.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb37a78ae0---89170613268.pdfIn PDF document text
    • 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_off0000ea78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA78 17632 bytes
SHA-256: cfe56da7a68afa323daa3f189de1f087f3a2d72699f5da4eec8a14aa20dc356a
font_01_sfnt_off000118a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BC 10808 bytes
SHA-256: 9f99e3b482842366aec5360264da3ff4112f8a48af201f3b5fb3b78b9dd7cb53

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