Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b5bb60a0dd5888…

MALICIOUS

PDF

80.3 KB Created: 2021-05-30 06:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c9cbf538cc7cd2df336f77efdd67f582 SHA-1: 427845cf13ceab89ba3ae8c7f06f60126079fe48 SHA-256: d2b5bb60a0dd58889bd9bd995df9ad2312bb1c182998ce1f569ed0a2d4ff6fb6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's content, presented as a 'schedule of building works', is a lure to encourage users to click on the embedded URLs, likely leading to further malicious content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/strik?utm_term=how+to+write+a+schedule+of+building+works PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412568/normal_60210755e92f9.pdfIn PDF document text
    • https://dofidosuxemaxej.weebly.com/uploads/1/3/4/5/134595751/0b1937e46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455376/normal_6054c8cba518e.pdfIn PDF document text
    • https://mefiwipof.weebly.com/uploads/1/3/4/3/134320940/4eab0937f82.pdfIn PDF document text
    • https://jewuvasoseximu.weebly.com/uploads/1/3/4/3/134355154/rixapegipadojeb-rusibosunu-doneniruk.pdfIn PDF document text
    • https://dafalozurevibi.weebly.com/uploads/1/3/4/3/134308304/21409.pdfIn PDF document text
    • https://kipejuxi.weebly.com/uploads/1/3/2/6/132682137/2b4e82651e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484156/normal_5fd3dd04ee40d.pdfIn PDF document text
    • https://xigizimevavas.weebly.com/uploads/1/3/5/9/135982966/4b84c75eb2a7127.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386334/normal_5febc95f05ff0.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4419826/normal_60b2d43c2314d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481527/normal_606bfae211d4a.pdfIn PDF document text
    • https://bemafaparad.weebly.com/uploads/1/3/2/6/132681832/9659956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_60494aa42edf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486354/normal_6038f7c00e5ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485299/normal_5fff7465a030e.pdfIn PDF document text
    • https://jirorenuges.weebly.com/uploads/1/3/0/8/130874518/3744416.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408476/normal_60340dcbcfa24.pdfIn PDF document text
    • https://xisilejawot.weebly.com/uploads/1/3/4/0/134016881/votojojaz_gafozituwaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417226/normal_605671a1e9c7c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/452dc3d8-6855-482a-a486-c537d8796381/95703775494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f8b7895-68ef-4d32-b3eb-3e348cf57a59/93985513221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/256cc8c4-beca-4f2c-8cac-dab4cbc16844/is_warcraft_3_reforged_playable_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90ec2162-fd62-4111-9697-53ebabc6f7c7/how_to_upgrade_your_dstv_package_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81dcab68-36aa-43ee-894a-645166e8061d/how_to_cast_disney_plus_on_samsung_smart_tv.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC76 5540 bytes
SHA-256: 7a69316653dff4d38261cb902e0be7ef0081d5f8f08355ea9cb32e9148364639
font_01_sfnt_off00010f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F56 10624 bytes
SHA-256: 80af1ff2a96f5929217257829ed85e44ceca223c670b011a14bffc1deb40e454