Malicious PDF — malware analysis report

Static analysis result for SHA-256 49172db8f78166ae…

MALICIOUS

PDF

73.3 KB Created: 2021-03-11 05:15:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a9becc0f7bda5b2ce4cfeaf61d83fc16 SHA-1: 304d32168c71a896460a9fdb8c36ccd3b548c56d SHA-256: 49172db8f78166aed894ad99eb371f4080cde2a459565c0996b9567dffee4004
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 5

  • 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 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://nipisod.ru/123?utm_term=vans+authentic+platform+2.+0+white PDF link annotation
    • http://saporik.scienceontheweb.net/22809434742.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476001/normal_5ff994ca861a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419198/normal_601e75b1a9a6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407989/normal_60161d7080b3f.pdfIn PDF document text
    • https://lifagixuwemup.weebly.com/uploads/1/3/0/9/130969738/jujava-bijixov-sodowiwenapulas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474446/normal_6017b4ffb3c9a.pdfIn PDF document text
    • https://milorupubi.weebly.com/uploads/1/3/4/3/134317418/womifukasabemalolar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_5fe8361e3a341.pdfIn PDF document text
    • http://dexaputanit.mygamesonline.org/46610429329.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/gozilum/how_to_install_smart_lnb_on_dish.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/65678464623.pdfIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/76604366234.pdfIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_c69b87029b684233ab2f85e2cd4ecde1.pdf?index=trueIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_62c6675b525848bbb0c4586e9b765ce5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9c5dea2-75ba-4fbf-8c35-700dd58fb6ba/mazenazip.pdfIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_2356b1214e764bf188347645fc0173e2.pdf?index=trueIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_d9bb945652934cf187c7f49ad4e7ca4b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ed1fea-14b5-4d9a-8f7f-7fbe8ffc4459/10512190931.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/95486188156.pdfIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_235df240d1354ab98cee35b786ed9b18.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d3ef840-de49-4407-b4f6-f7e463875875/bopabivugizanemurixet.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_off0000defc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFC 5616 bytes
SHA-256: 35bc337a13c966ef1b1fc1d212dd31ffbae66812893d0187d6687d45f1e36792
font_01_sfnt_off0000f209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF209 11112 bytes
SHA-256: 4a381aa950fe05b75aab0a7499a6418314d78bac78558b881807c94651ae5119

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