Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc79348475852e3f…

MALICIOUS

PDF

85.8 KB Created: 2021-08-22 04:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8171789261d41be24adab045199bd606 SHA-1: 197dfb3ac882a27d68f8dcb1c7bde69f059b4d7f SHA-256: cc79348475852e3fc29fc5ac229a59c27e2a53d432c14bdd0231937e3960cfa3
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The presence of a link farm on disposable hosting further supports a malicious intent to distribute harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://studioingtassinari.eu/userfiles/files/16810156025.pdf In PDF document text
    • http://grupophi.es/uploads/files/49324867473.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/fg0m19m3b3sfm7odfsdpai0st7/lijupifadulipemupubodaz.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608284737d09c---rawaxujitakoparinuretuta.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/76091235186.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/54995298708.pdfIn PDF document text
    • http://grandviewcommunity.com/userimages/36453254732.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/xowezuzesori.pdfIn PDF document text
    • http://mooneyes.pl/userfiles/file/wewotodibopemelorebu.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/3130983879.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/4b2eaadbf8395f3fb49abb7309e8ca43/bivasexuxasuwodu.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/78880981964.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2a4d7bac7---67464244186.pdfIn PDF document text
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/51657232773.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/lijurubusepupiza.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/79205776004.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/49293797858.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/29378518249.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///94461425936.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/31922c4e7ec8bd4696e8339a337fe567/49288520962.pdfIn PDF document text
    • https://tuvanthietke13-5.com/webroot/img/files/xovelodapi.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/20qsajdjcjlcigimhhmr05oicq/44013962087.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f5e39d61e---39868870422.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=clash+of+clans+new+update+2021+mod+apkPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A7 11296 bytes
SHA-256: d6df725a0a2286f35184430e402ac045991c224b2ac3a73b87ef11c5da03089c
font_01_sfnt_off0000ff35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF35 18476 bytes
SHA-256: 0906068e2154f83809670220ebc4d387ef130f1dcc29dad8983d20a78cbbf500
font_02_sfnt_off00012f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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