Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd52f194cec93e2…

MALICIOUS

PDF

74.0 KB Created: 2021-03-23 12:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6539d9160cbe7cdc79f75d472c99bb4d SHA-1: ee9864d13eb4f2e56906c8ac237a07bc35405b54 SHA-256: 8dd52f194cec93e298751e851d348d349e0c791c990de7143509f4b0a7427a88
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 0.9996

Heuristics 5

  • 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.
  • 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://xezojetit.ru/award?keyword=novecento+baricco+pdf+libro PDF link annotation
    • http://gudakiradajonob.iblogger.org/71332904107.pdfIn PDF document text
    • https://lupudeme.weebly.com/uploads/1/3/1/3/131378919/muzeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456135/normal_60242c861ab3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390366/normal_601e42fd822a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421058/normal_603ff1c0a8bd6.pdfIn PDF document text
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/susis_wuberar_wovazalugeb_giwosumebaranub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466413/normal_6040c1bf0bd2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485689/normal_5fc7d12984f82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366027/normal_5ff25d81c2cc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450418/normal_5ffe668d99d27.pdfIn PDF document text
    • https://bajozofexowabir.weebly.com/uploads/1/3/1/3/131398176/bfcf7585.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/daxemo/vozupiv.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/android_tv_vs_smart_tv_india.pdfIn PDF document text
    • http://mibarup.epizy.com/advantages_and_disadvantages_of_using_ict_in_education.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/gedanawuxojow.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/jepamumigorapi.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/2006_honda_civic_hybrid_battery_life_expectancy.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/ezra_pound_cantos_italiano.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/vozufesa.pdfIn PDF document text
    • http://lazevemu.epizy.com/united_airlines_flight_information_status.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/what_is_the_theme_of_wicked.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/25704631402.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE131 5140 bytes
SHA-256: 6a89dfaddb6f615857916608449de3c433c87d6ac710be82f59e03ff40ca8f25
font_01_sfnt_off0000f2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C7 12772 bytes
SHA-256: 4a95c0e110f275082a1eca2c1f497805342531eb2911f3cfd7d842e0ce3d734b

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