Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8cdf82ddb2c8d3…

MALICIOUS

PDF

90.1 KB Created: 2021-06-25 08:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7121eb1a4607ffb537f6c6d07bc8133a SHA-1: 02995a03134ffdeadcbc14d9c06cf12dfaab5d03 SHA-256: ea8cdf82ddb2c8d3ae6f17f1dfb5ab33d7cf12f3d7dd98443514917a9b14f46a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of external URIs and link farm heuristics indicates a clear intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://huntic.ru/uplcv?utm_term=cross+breeding+mutants+genetic+gladiators PDF link annotation
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/b12b338ccd749ebc7cea91e681666b64/geremupodudobowujoferaw.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/bapinepugapobesukowodi.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/b4c167d6e6c58ff8d2b2a9542cdd5b09/suratolusapekibakazoseno.pdfIn PDF document text
    • http://salkim.com/userfiles/file/40791565571.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160801283359d4---vakenaxumisutedu.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/bgsvt1ejii5kvij8kr9v19hooh/42841535586.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/zonedidugogaxodu.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/81ba8078f18b40d2ef238013c86ed7b7/84772112229.pdfIn PDF document text
    • http://merwepizza.com/upload/file/6155843654.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/31737362388.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/ijer4cudn7tsukh29s7bocg36i/xavetipaz.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1024e6fe3e---zajukibibokuwewije.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/eed8b0c91faf9022a4824f86711cd72a/sepafifajurobumixigup.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609063c47e56f---zofitopipa.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740e7778a6d---2398078643.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec51c9b499---xuvetazesukuxej.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a986a940bc7---70586138308.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/76420412765.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010703.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10703 16060 bytes
SHA-256: f6b23306167ffe54b763c077393028a7a118862b98488c2f5a2fd98244096d08
font_00_sfnt_off0000f522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF522 5304 bytes
SHA-256: 6e48ba935cd3e6c0fee70b272ca688c6fa7df397460f40c3a16844d8d1e1aa6f
font_02_sfnt_off00013366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13366 11212 bytes
SHA-256: af6983a012a2c3549d0b848ea83fc2d5436f6484afb364f34d3486ac8537ca4e

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