Malicious PDF — malware analysis report

Static analysis result for SHA-256 785bc983132cf641…

MALICIOUS

PDF

76.5 KB Created: 2021-04-01 06:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0510a90c8f9e879620c161d37ea68314 SHA-1: 84cc8c4555026298b7898196db3c49eeefc93471 SHA-256: 785bc983132cf64179f5647866b1f752bf4b3de3b9189bec2b58779d0867e344
156 Risk Score

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://vilenefex.ru/aws?utm_term=how+to+reset+avital+remote+starter+after+battery+change PDF link annotation
    • https://zefivevolexu.weebly.com/uploads/1/3/1/6/131637056/limadofatomak_gidujali.pdfIn PDF document text
    • https://povarudoro.weebly.com/uploads/1/3/5/3/135324530/dopijafebojiwi-xefibiw.pdfIn PDF document text
    • http://pixujuxe.mypressonline.com/63788674959.pdfIn PDF document text
    • https://lakogobeza.weebly.com/uploads/1/3/4/0/134096968/7934488.pdfIn PDF document text
    • http://nuzalozipofeven.22web.org/bingo_game_template_ppt.pdfIn PDF document text
    • https://wesuzekubiw.weebly.com/uploads/1/3/1/6/131607103/pipitiwikoxavu.pdfIn PDF document text
    • http://finonit.mypressonline.com/batunapavu.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/tiwanavepofe.pdfIn PDF document text
    • https://letezinujafi.weebly.com/uploads/1/3/4/9/134901841/jonixulemisatapam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pipotapa.rf.gd/ocr_a_level_chemistry_paper_3_specimen.pdfIn PDF document text
    • http://vubuzixefixa.onlinewebshop.net/75564279467.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/sojimixusot.pdfIn PDF document text
    • http://somaguxu.epizy.com/legend_of_dragoon_strategy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/error_reporting_php_code.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/siraxofamisodulobajuta.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/relative_pronouns_practice_test.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/68618116237.pdfIn PDF document text
    • http://xemigososefof.atwebpages.com/fawazagozederawexatisofe.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/57849214928.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/20497597413.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/88454558066.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_off0000ec21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC21 5648 bytes
SHA-256: 20aacfedf3a8cfd0e296f1b90c2b3f52db78addde9c0017641b48cb9d2e7cdb4
font_01_sfnt_off0000ff50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF50 10824 bytes
SHA-256: 3678b5f73b54aa0db0c0756be6154aac2dd37a6e8b80ec7000cfd409ad65d4ad

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