Malicious PDF — malware analysis report

Static analysis result for SHA-256 104da89d465d21cd…

MALICIOUS

PDF

71.1 KB Created: 2021-09-01 06:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c610750e285ef770c1294760178b82f6 SHA-1: 67799c5e2c54be53639e4fe94fe776905be3c54f SHA-256: 104da89d465d21cdccc25f256b813e8dd1ae34a427d7bcb92898cb456553c099
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised websites and disposable domains, likely intended to lure users into downloading further malware or submitting sensitive information. The presence of multiple external URIs and link farm indicators strongly suggests a phishing or distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://minipowerpack.net/upload/files/tesavezekoxaxoresifu.pdf In PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715ee72e6c0---52262472903.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/0aa1dd1fc4560ea022f6ba1a5a3c3b46/nururajifobi.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/71848096282.pdfIn PDF document text
    • https://werbemittelag.ch/upload/file/33624601446.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ac885786e---30802805090.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c5d542253---20290505422.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/jepubuvadebazafateborox.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/0accd72d29431c963f6c02b1845cba53/31804050328.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f6ea1ccfc0e---35722795236.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b02739980e---22259150075.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/elb1t1strhbg2ievlpvm9uqmno/47035662265.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/c655182536bc921865fbcfbd81abe9f1/dujisawepixaribelisewep.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/73ccd4e152087b58ecc25bdb1fb3ffa5/kivovaridemademo.pdfIn PDF document text
    • http://ecole.ru/text/images/file/77672223527.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210603_726B49A19B67BF86.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/57121lp454u94a6l8a4gfrded7/33004069088.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/zuzubosomonivo.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/49260939671.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/nijuxifuxib.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/xorasidinuzebo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=harry+potter+and+the+cursed+child+play+ticketsPDF link annotation
    • https://lapdonline.org/file/45829946075.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_off0000b7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A2 10908 bytes
SHA-256: 99db5d18fde52ed89d1ae05544c230c573ec3a19da661374efd5ef0454a70b82
font_01_sfnt_off0000d0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DB 14936 bytes
SHA-256: ab5325ba3c48458408d49c2395994948574ee338e413c80e816a779ee42de465

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