Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a290dd9b6db0267…

MALICIOUS

PDF

78.6 KB Created: 2021-05-25 04:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 720a0f217a9ac0c5467f7767bd042985 SHA-1: bd9922c6bd03555e91e76132485c0c23d903f7dd SHA-256: 0a290dd9b6db02676d2c700d42de79aa4418e33d2db487068fd8cb90e3951fa6
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://botokaw.ru/strik?utm_term=how+to+increase+amh+levels+in+ayurveda PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464539/normal_6022c3063c750.pdfIn PDF document text
    • https://levarimabogi.weebly.com/uploads/1/3/5/3/135328943/supunironubuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388420/normal_606c4a3c0abf6.pdfIn PDF document text
    • https://gepopoxano.weebly.com/uploads/1/3/4/6/134663556/7479481.pdfIn PDF document text
    • https://gibodogud.weebly.com/uploads/1/3/5/9/135994226/8e9863e8463.pdfIn PDF document text
    • https://bikafosujikus.weebly.com/uploads/1/3/2/8/132815014/e6fc447720ff38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483346/normal_605063743bd1e.pdfIn PDF document text
    • https://tinonerapize.weebly.com/uploads/1/3/5/3/135349756/xogejakidilup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483602/normal_5fd2c5c74a391.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2503ac34-f521-4a50-a701-c1baa718dd12/xedogite.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/how_do_you_unlock_the_control_lock_on_a_whirlpool_duet_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/singer_201_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/96976954833.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/44702850894.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/6361043772.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/celestron_skyportal_wifi_module_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/libro_azul_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/is_burning_500_calories_a_day_enough_to_lose_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99b5219b-c925-4a88-965f-9f1f599c5796/viwapupumazusawazu.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_off0000f415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF415 5392 bytes
SHA-256: b105cf8e1d93f5f75ceb49be02864926871b71f4805cfced494dd195872a173d
font_01_sfnt_off00010658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10658 11376 bytes
SHA-256: a9278d734f5250a389cf34d0624e2287f1fb53f1e2698b8db53d6e351a1c58b9

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