Malicious PDF — malware analysis report

Static analysis result for SHA-256 943955600fa25d8a…

MALICIOUS

PDF

89.1 KB Created: 2021-03-17 06:20:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3c98a3f7dd7f756ca0bf6a7f32f294f9 SHA-1: 26ecddbcf8eb4890994f5d8e2e4194b8587afecc SHA-256: 943955600fa25d8a9e14c96faa2ec4910d11fc63d573ed80746365e1ae206525
156 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 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://maypoin.ru/wix?keyword=facts+about+halogens PDF link annotation
    • https://cdn.sqhk.co/xokebuzizo/hNHgekb/7_minute_tabata_workout_inger.pdfIn PDF document text
    • https://kowalarezanir.weebly.com/uploads/1/3/1/4/131438161/kerixumisizolew-pivadomafe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479470/normal_6005956e79c3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369507/normal_5fc772b3e42e0.pdfIn PDF document text
    • https://cdn.sqhk.co/totarujined/hjrhaij/angular_template_driven_forms_custom_validator.pdfIn PDF document text
    • https://nuguzawopaji.weebly.com/uploads/1/3/4/0/134040365/jeroginisibutupaj.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/hjUhiiq/27144551541.pdfIn PDF document text
    • https://cdn.sqhk.co/xamubana/ghjSVih/nail_salons_near_me_low_prices.pdfIn PDF document text
    • https://xefozevinunakab.weebly.com/uploads/1/3/4/3/134340699/8aac45dc6099.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/4hgjcgh/24337902080.pdfIn PDF document text
    • https://tedagenuv.weebly.com/uploads/1/3/2/6/132682668/dewexilura-dalikajo-nelujujirare.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/zodawanuror/rerofowopi.pdfIn PDF document text
    • https://4b002d3c-a55f-42ce-816c-238f848e88a9.filesusr.com/ugd/3398cc_2308e7954abf4adabf9f4b47fbd34a79.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/reported_speech_imperative_examples.pdfIn PDF document text
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_1ec99f309de24d3e9ec06d58fed65585.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/panokojol/94028789146.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/zofija.pdfIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_1636fc932d00435aa17cdbccf7b1c012.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/dish_tv_guide_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/14807036620.pdfIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_903716835b4f41c4a0079bf676fdb373.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_off00012065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12065 5060 bytes
SHA-256: e5b2e659fcf9534065c15c1898bd61cbeddee2ff113d78ceb1f56095bd1309dc
font_01_sfnt_off0001319d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1319D 11184 bytes
SHA-256: 19140b590da71673e3e9f22f4ebe82a8ace96c5cdf2828d09aaa267eddc00026

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