Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd01fe3e54d3028…

MALICIOUS

PDF

79.6 KB Created: 2021-09-04 22:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d3183bc44b102d39ce2a2937a971312a SHA-1: caf75db83006bc0afdcd39434401f33280ad06b2 SHA-256: 6fd01fe3e54d3028419238250a6feea20fd5ce71dd1d7f1bb6bcaea19b551471
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many hosted on compromised websites or disposable domains, suggesting a link farm or phishing lure. The heuristic 'SE_INVOICE_LURE' indicates a potential attempt to trick users with fake payment or invoice content. While no scripts were explicitly extracted, the nature of the links and the ML detection strongly suggest malicious intent, likely to lead the user to a further stage of infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://anpheatingandac.com/nbloom/fckuploads/file/41761290756.pdf In PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16117372661781---85747854602.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/laxirebejafudigalowadupiw.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c947be61e98---wodomevudanokawajavomidu.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/i6agkrlmha43uji06tuaj7u266/21143205769.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/25888432619.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/gozanuzadoxutefigeseju.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa17b53adfe---92734721812.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/2f09d6fad4679af9cb3b8f2eea47c799/wuzasefedowovimazuzipof.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/1f71fbe63daa1a94b2a2046eaa885347/titafisebupope.pdfIn PDF document text
    • https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/902b0eb8ff793964090263b89509e1ac/49843583719.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/32865893187.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/94823701770.pdfIn PDF document text
    • http://seamacros.com/upload/file/tulogorokaraved.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210616024242_kpznsa.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/33747909394.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/mnc0gog478u3068ku7ha9ejq1k/fulovezaku.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/slgrf67vi8gue9r4pf5mvgpb13/dibimo.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/5890e22335fdf1e70ced7b9b02f2a59b/94782293008.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/nejolalesitifi.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/sevugifugirufagadiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=engineering+mechanics+statics+solution+manual+14th+editionPDF 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_off0000d12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD12C 17796 bytes
SHA-256: 810cfdf241695ea1e9e7b41c45297aa01a42d20a60e03ca591e55324aecd3f49
font_01_sfnt_off0000ff56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001176d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176D 11032 bytes
SHA-256: 4084189eea061e239cdeabaa5d4ed8d171af5ff940a9705cb530d9e592f85900

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