Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6bca88d5db2f27e…

MALICIOUS

PDF

79.9 KB Created: 2021-08-14 14:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9c4e4294abd2d594f1d18c164e85f02b SHA-1: 205b8ae0f0ddb583ea59ef29520d0a320c5dc03b SHA-256: b6bca88d5db2f27ed0a3c48d61dd21849c47a317f9cb7aee879d82848302b980
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to lure users into downloading further malware or engaging in phishing activities. The presence of multiple external URIs and link farm heuristics strongly suggests a malicious distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/1r0keqec93gcplmo45cecr95gi/22004883320.pdf In PDF document text
    • http://balade-pierry.fr/userfiles/file/bavogojugawomoweve.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/l0sdnslo89d3mfel72j7all2sd/42875934801.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/xokulogidanedude.pdfIn PDF document text
    • http://biomisszio.hu/tmp/xozosagulipu.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/87239310328.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/gomexagarevinepajedazox.pdfIn PDF document text
    • https://chemasan.lu/userfiles/files/49150336394.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b423c7ee52f---11051004993.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fbd254158---vojakifuzofosovom.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/ukfmdr31h2i4hokr19r2a8edo7/70056750874.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/79164002418.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/bdad174c6591b53b0b4b6f217a9c7026/58800725456.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/xisufavuro.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/b4f599df2e5442db0a1bc9076e0edee3/59714096245.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/31ce698ab763fa9707fcac8cf11a3022/nabogevenesu.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a0042a709---buxekomu.pdfIn PDF document text
    • http://leton.pl/userfiles/file/fodojaxiwop.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a04b9a36087---72439086468.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/62319203035.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/72098377429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=prefix+suffix+games+3rd+gradePDF 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_off0000d671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD671 10704 bytes
SHA-256: e98b64244a1f3b2f7441781de00550079f255f5457252dd717640cc628c2fee8
font_01_sfnt_off0000eed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED7 16720 bytes
SHA-256: 06f886fe970f845cbe325e059b61755ed389e30ffe47ba298b4244324358f582
font_02_sfnt_off00011a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.