Malicious PDF — malware analysis report

Static analysis result for SHA-256 17880ea346dbfb0d…

MALICIOUS

PDF

76.6 KB Created: 2021-03-24 21:16:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: baf487ed27337dc640adbb65c3f73c7d SHA-1: 8ca7263ffc26151eef0aabbe131e4078e24862b3 SHA-256: 17880ea346dbfb0d076c9f3eb31ce356d218eb6689b30039b7dd4816eb4d8df8
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 0.9998

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://crophysi.ru/wix?keyword=abdominal+arteries+and+veins PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379964/normal_5fc7d1c24dddc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368745/normal_5ffd53d064485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401703/normal_6045ff9b33282.pdfIn PDF document text
    • https://silavetej.weebly.com/uploads/1/3/5/3/135314504/362ca5436716d8.pdfIn PDF document text
    • https://xinusikavafomi.weebly.com/uploads/1/3/4/3/134353784/1787813.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/vapelurowar/69429275414.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/jatofelifeso.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/template_powerpoint_bunga_sakura.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/kalesilebetuwipatape.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/bombay_dyeing_bedsheet_online_shopping.pdfIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_f4733f94922847869cb4216718701a4d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bubeto/delta_contractor_table_saw_replacement_fence.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/automatic_control_system_kuo.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/tolifafafose.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/30465291241.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/free_empathy_map_template_ppt.pdfIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_cb3783ceca594da8ae221ff400eeabc6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavobawum/valukupirosenomunupu.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_off0000f0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AC 5160 bytes
SHA-256: 1b5ca45234c0b1bac017a9e3de173acca3391fe6b985b2c9115a41dbf1151ccf
font_01_sfnt_off0001021f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021F 10272 bytes
SHA-256: b25e5103254ac8106cfa4291f402bff5605964e1025156389f29a4a362e36f23

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