Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd63e571071e3358…

MALICIOUS

PDF

77.2 KB Created: 2021-03-14 01:12:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 360139d61bafa6f626803b7fa3ede725 SHA-1: 582f9022948f4cdca804bb1d085b50259c392ad1 SHA-256: fd63e571071e335813f60b127a0c42d62180fd999f87c33e10b7572696f71318
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms or distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL points to a domain associated with suspicious activity, likely serving as a distribution point for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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/award?keyword=agency+problem+in+corporate+governance+pdf PDF link annotation
    • https://revowerixes.weebly.com/uploads/1/3/1/6/131607662/gekizanamubu-ribosibi-poxarolegu.pdfIn PDF document text
    • http://segaruzobuguses.scienceontheweb.net/after_book_3.pdfIn PDF document text
    • https://xebolefijepipol.weebly.com/uploads/1/3/0/7/130739937/wemuwanutinisaz-kinekemuve.pdfIn PDF document text
    • https://puvomowaja.weebly.com/uploads/1/3/4/3/134318832/158bf96b78f.pdfIn PDF document text
    • https://zusonugen.weebly.com/uploads/1/3/5/3/135305237/1456210.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/45767777733.pdfIn PDF document text
    • http://peguxukeziku.sportsontheweb.net/45903140461.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/fibironodulakomajiba.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/dowesitobuga/hearthstone_conjurer_mage_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/43662681782.pdfIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_38777fb4e3cf42e1999cd947fd624ff2.pdf?index=trueIn PDF document text
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_aa823dfda5dd4b7fb7ff5339911ecb60.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lefemijip/rusinumifinigeweg.pdfIn PDF document text
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_688edfa3d9b54408b75cfa05975a544b.pdf?index=trueIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_6f4cf0da2d08425a98cf92ef1c5f5c6e.pdf?index=trueIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_d7aa7da7e73d42299ad2e1df82b54bbd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jonora/pdf_xchange_viewer_measurement_tool_scale.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/famous_astronomers_worksheet_answers.pdfIn PDF document text
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_a018545d18684b7fa48aee5c7521a387.pdf?index=trueIn PDF document text
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_82d81dedd01d43f58ef6447a21277203.pdf?index=trueIn PDF document text
    • https://bc421601-a865-4a1c-bd86-85d9d92758d8.filesusr.com/ugd/c068f8_1a5b3a12e6e34a19b3036b9eecd7c139.pdf?index=trueIn PDF document text
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_646b79f2a141462bb60d385b308ca256.pdf?index=trueIn 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_off0000ee82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE82 5588 bytes
SHA-256: 2c10c155748c85b6ee04dc40f8f73240e27d2acb36bc43ffd064fa3d6c2d3c59
font_01_sfnt_off00010182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10182 10852 bytes
SHA-256: c04ae34e6af12eea79eb9076fe985344d245f4e4290268fd1957278319a1913a

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