Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b7bd1b697eafb22…

MALICIOUS

PDF

87.5 KB Created: 2021-06-26 03:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 560f5d13267a968c89799ec905f55dc2 SHA-1: d35c5cdbcea016d83872c8130bf5a26c87b496a5 SHA-256: 6b7bd1b697eafb22ab5abb9b58b7c968d51f6a86bf9d01993e61cc877810226c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish for information. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing and malware distribution techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/0ekr0s6oorilem74418i5lv357/96522093364.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855ecf7bcef---75742793203.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d24fe069571---50640543448.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/fc4c791b13d8b58f272c3fe58b0ac467/6744209799.pdf
    • https://bataretak.com/img/files/file/texixenazejorupakikamog.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098c16111247---pumirejotowubabunigewu.pdf
    • https://edu-mate.kr/_UploadFile/Images/file/43361079754.pdf
    • http://dollreunion2020.com/clients/4/43/4392dc7a9e9236654a628da0af121bbb/File/425452858.pdf
    • http://scoutpate.com/userfiles/file/43852738206.pdf
    • https://bwawarszawa.pl/upload/file/zugugigoxuvebemaborid.pdf
    • http://artin-intranet.com/ckupload/files/6096314071.pdf
    • http://mytmbc.org/fckimage/file/disuwubilimikutumalaliw.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/945512d979dbd4ea8a0661f562f71f1c/pepovutiwevevuneb.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b95af8ddba0---6233304626.pdf
    • http://animationcoach.com/userfiles/file/zipupopekesedogitav.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/f2534013b6b42316dd449900398dc552/lasexadax.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad5e303805---78260126875.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a5f93b9c0---4206649309.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/nsprop57ukcd0nb5oka3mtsn7i/53476670274.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/u3u92ej86lc350f58ilmepj093/xipamilugeroxokotax.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c76c3d5dc25---nosumivodinu.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c25180bde---nefizap.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/2b8e2f5ffaf361bba781b78ece241176/tatog.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/c0281130e7143edac3a4241b4b5d542d/jisewejixesipukaxoxa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=2+5+pounds+in+kg
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f41b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF41B 16792 bytes
font_01_sfnt_off00010c32.bin
aea1ba054ab86942b76c6611bf8bd8b045ad4fb4b93fa8234edc53b024b8647d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C32 10376 bytes
font_02_sfnt_off00012392.bin
11152279e8b7fec1f82a01c106a0667c77fbe53870fc8031d50ec0058f60638a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12392 17116 bytes