Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5e22a883ab166c…

MALICIOUS

PDF

80.6 KB Created: 2021-09-18 09:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 06ff49652e87f1afaaeb84263eb10358 SHA-1: a4479bb4389e679fbde1c62347b141c9acbef7fe SHA-256: 5d5e22a883ab166cd572a994ad59274e7572995a5b0fa92dafdfd9180db4332b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://pixomot.ru/uplcv?utm_term=get+full+size+image+from+camera+android PDF link annotation
    • http://airmon.hu/images/files/xumomememugutetaleg.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/30681638677.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/90115933051.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/63962011025.pdfIn PDF document text
    • http://na3.it/misc/file/tazedizofitotam.pdfIn PDF document text
    • http://veszpremkosar.hu/_user/file/38194779352.pdfIn PDF document text
    • http://www.kroonzuivel.nl/ckfinder/userfiles/files/42960824530.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/7456154531.pdfIn PDF document text
    • http://parilka.by/var/upload/file/mijitutusekodolenarar.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/jelumajuwiniwa.pdfIn PDF document text
    • http://hdurmuslar.com/images_upload/files/jebopokipadoboregi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161404eeead2a2---56009107254.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/jafekijamuwanezut.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/4cf8cd6c27b8e988a90cc79300101e7b/xenutanakaf.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/02f53df39e6ff09c0836c464300c563b/sabitoxudosisuzuxore.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16132ffe36235d---70191340482.pdfIn PDF document text
    • http://kleinschaden-expert.com/userfiles/file/konami.pdfIn PDF document text
    • http://eatoceanic.iorderfoods.com/uploads/files/97392048515.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/58449853337.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/36178414161.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/52753780295.pdfIn PDF document text
    • https://groupekheidri.com/ckfinder/userfiles/files/11313893535.pdfIn PDF document text
    • https://egc.ecrom.work/syo/files/80141754315.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/dobozidofavafaxemusijaz.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/fuxewu.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/xepofujunur.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_off0000d3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B1 11016 bytes
SHA-256: bb187c37fea353c2cc4d385ee54d10fecbeece986f2e1d981db0ed9f5bf0459a
font_01_sfnt_off0000ed22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED22 17972 bytes
SHA-256: abde04774d7eb36912b8ecb9eccc123bd4e04f07893dce6423798e448ed16977
font_02_sfnt_off00011c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1