Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3cecf480ffed96…

MALICIOUS

PDF

78.3 KB Created: 2021-04-06 23:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0045006cf03e97cd14d46d6f8cba1282 SHA-1: 75e1bafbbda234930e106a79dd737d83dbd697a0 SHA-256: ad3cecf480ffed9610405bce408f1e7a7169590a06e1c6d24b0b3adaea5ab4b0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://botokaw.ru/wix?keyword=modern+biology+textbook+chapter+14+review+answers PDF link annotation
    • https://rakatifuz.weebly.com/uploads/1/3/5/9/135964199/4730205.pdfIn PDF document text
    • http://tofugezupeb.mygamesonline.org/65107316173.pdfIn PDF document text
    • https://vitebikune.weebly.com/uploads/1/3/4/8/134895950/figimavulifonuj.pdfIn PDF document text
    • http://vufajed.getenjoyment.net/40220805035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492245/normal_600e65ffc1034.pdfIn PDF document text
    • http://jonebukusopovet.mygamesonline.org/holoenzyme_and_apoenzyme.pdfIn PDF document text
    • https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/purojapanu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489730/normal_6010a79ce3e15.pdfIn PDF document text
    • http://juraxoxodas.scienceontheweb.net/how_to_install_cosco_scenera_car_seat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428331/normal_604e658e094b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409248/normal_6043e9599f312.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/62894729531.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/temiboraz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f9ce72-2e01-4b72-863f-fc35dd76b023/contact_information_for_sentry_safe.pdfIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_7541285a347d4ba0b63b5ffb0983e7f6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d10ed74-ebb4-49ae-84aa-a544893b1a69/what_kind_of_oil_does_a_2010_scion_xb_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ea462f-5926-42c7-9afa-14c67faa02ac/gepetovukoteva.pdfIn PDF document text
    • https://3a5aa097-47f9-475f-9992-83bceef25cc3.filesusr.com/ugd/f55bec_6407b528c4ce419ab9cc13c1aaf35368.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8f1ea6a-b1e2-46cb-b91b-3d1cc9026f67/96340181656.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/how_to_improve_fitness_over_50.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d04fc598-891b-45a8-bdbd-3a6f6e758928/sinagonesexabo.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_off0000f47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47D 6004 bytes
SHA-256: b2dc8e28e10bd4b7abc134f7f73600eea46c3689c911f346ead27461cfb4ff4c
font_01_sfnt_off00010918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10918 10220 bytes
SHA-256: f1de227714bf13955dddf18c5a3f61a0a9e81ab54f4c32f6073512e66143a822

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