Malicious PDF — malware analysis report

Static analysis result for SHA-256 08dcb3cc9fe315da…

MALICIOUS

PDF

87.0 KB Created: 2021-06-28 00:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ac8f124a87369eb1715939f675b45ae9 SHA-1: af5678fb55b6f718ffcac0106a5c28388d517ebc SHA-256: 08dcb3cc9fe315da667bbc372b9debf6dc285cad0a4601bbebe702afcf67c363
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The document body was unreadable, but the presence of many external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://inwebjor.ru/uplcv?utm_term=what+were+you+doing+answer PDF link annotation
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/luoqu8dgqii4pf7kqim1e7rdk3/furesidufuduxipanipiwejis.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d001fe13c0---jozeguwakasoxo.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/uefj89b4fitb6ho7l67h40dcb4/35616498787.pdfIn PDF document text
    • http://garderoba.sk/images/_file/bibejakigenikinavop.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9ba7567bb---42778700225.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/6od47q2hmlsrbeq6lvv22613mh/72231502897.pdfIn PDF document text
    • http://teifsepahan.com/files/file/jazule.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/vqvdci28kjjvt6jeruk8cccund/xajinevenuxerafosuv.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/o6j9l8pt0j00i4rm2j2h0n0rp4/67301307029.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/76ah1892ctunm9k9gn1fos7vs8/pibunojajega.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d845415a7---31437015595.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/20399662313.pdfIn PDF document text
    • http://xpressup.com/userfiles/file/ranakudufoje.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/fazifofuzitilujisa.pdfIn PDF document text
    • https://kham.vn/userfiles/file/taxemudinegikitok.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160949dac4aa29---vomuv.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/aa06e7ca125d44ab5d83b71b600c6a7f/bujugi.pdfIn PDF document text
    • https://jurad.eu/files/file/73157855109.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/fuvanuragawero.pdfIn PDF document text
    • http://primaneighbors.com/userimages/wodipireka.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3babd9ae1---96110096738.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/33688747076.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608eed235b0a3---piguxijiwadinugu.pdfIn PDF document text
    • http://monktonlionsclubkidscamp.com/clients/9/99/99b8b5517e5fb663501b7ee5137ebf55/File/76776519453.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_off0000eea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 19784 bytes
SHA-256: 8e0fdeda8efe37676e9d88affb951dbbda71c99efddc6126114df35d98eccc9c
font_01_sfnt_off00011ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA4 10772 bytes
SHA-256: 03a712c364a5c493e23e1b0e1e997e1816098a4d61f592dd6791ad5f629efec8
font_02_sfnt_off00013743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13743 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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