Malicious PDF — malware analysis report

Static analysis result for SHA-256 24946a0eeb310415…

MALICIOUS

PDF

79.9 KB Created: 2021-09-03 11:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f0f5a0f45fb4b8a9737402a91598a5ed SHA-1: 84b868812e4ca82fb9c059396b34dfceb4923c45 SHA-256: 24946a0eeb310415c924e9e5b6b7879406ca06f7171484ccd69d75bc109d3b86
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and links to compromised CMS uploads, suggesting it's part of a phishing or malware distribution campaign. The PDF structure and embedded links point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://crysiq.ru/uplcv?utm_term=chinese+english+legal+dictionary+pdf PDF link annotation
    • https://energooptima.hu/upload/File/95475763395.pdfIn PDF document text
    • https://rm-parketi.si/uploads/88943690473.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b44f0cb116b27ca8b60740338bbe7370/zivemevow.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984a17bf618---welibedawilatife.pdfIn PDF document text
    • https://bkht.vn/userfiles/file/30087363004.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3cc4b73c4---walovixes.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/bodazifasor.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/34835900554.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/57605991523.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/64953524050.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/wasibekepevog.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/panugixovew.pdfIn PDF document text
    • http://ridendo.cz/files/file/83827120241.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/12137168090.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/lexirimo.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607201f05c5bf---xeroxitip.pdfIn PDF document text
    • http://yuha.be/_files/file/20627875574.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a3da76bce9f---jigexisiteloromupofewi.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ade17f0c0f9---genumemixiguxolagotobete.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/rikodaruve.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/fetolupofi.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/fbb07815ab4cae28757d93b51764c366/70531400304.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32be58d47---22784338963.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_off0000c96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96F 11044 bytes
SHA-256: 25e3542dee5dd6c388efda343b3a48b80d850d54483eaf54bbb6a6697c6e6208
font_01_sfnt_off0000e2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2ED 21232 bytes
SHA-256: 98a18c06eb21bd1e0b4f9dfe01d7a4e2c649139d6168ca783b22293ebe6874a5
font_02_sfnt_off000119dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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