Malicious PDF — malware analysis report

Static analysis result for SHA-256 177e95699e6802c1…

MALICIOUS

PDF

76.0 KB Created: 2021-03-13 22:15:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6333724706d6a3b28598d9573b4a442f SHA-1: 98b17cca741f756f7de5bdb957cf6677ace07572 SHA-256: 177e95699e6802c1af8fa1ffb47f637449c69f7883f71c81f54cc299e5e56b84
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wix?keyword=rogue+aces+trophy+guide PDF link annotation
    • http://smeh-mif.space/19339573707nfaxe.pdfIn PDF document text
    • http://tk-pobeda.site/76225252299kdmmp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_6046118ec85ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490917/normal_604cefe2c16b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366055/normal_5fc82a209edf9.pdfIn PDF document text
    • http://scriptbook.xyz/search_google_for_image_on_phonesxq41.pdfIn PDF document text
    • https://nibapexi.weebly.com/uploads/1/3/0/9/130969889/poginuv_vawok.pdfIn PDF document text
    • http://latencfsrt.space/business_superstar_idle_tycoon_mod_apkji2ic.pdfIn PDF document text
    • https://luragelekow.weebly.com/uploads/1/3/4/3/134377287/romakabet.pdfIn PDF document text
    • https://rezigetofetima.weebly.com/uploads/1/3/1/1/131163738/253724.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443801/normal_60161d2cc0c5b.pdfIn PDF document text
    • http://jejovonen.22web.org/72758190753.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://77ac2d45-d533-4b4b-a85c-01e81860bff9.filesusr.com/ugd/7f1ad7_030de6157f1a4228b032926ca0b1aca8.pdf?index=trueIn PDF document text
    • http://vemevusakeke.epizy.com/login_icloud_account_android.pdfIn PDF document text
    • http://zedofizanotigip.epizy.com/vebetovefetizuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/chutes_and_ladders_pc_game.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/7891800880.pdfIn PDF document text
    • http://detapir.rf.gd/sentencing_council_guidelines_drugs.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/kadabiduperojofejomobalo.pdfIn PDF document text
    • http://pavinudoj.epizy.com/34157126701.pdfIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_f1e4d5c3fca74d299cea85d66bd9b1d3.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_off0000eb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0E 5412 bytes
SHA-256: d91348717d6f169e18cbf77110621c04121a2d76a2abf972168d43d02744fc33
font_01_sfnt_off0000fd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD83 11032 bytes
SHA-256: 48dfed0fb0ca1ea06cdce58946cd3d8cb4809eed35d91b9af73cf2069b18fb4b

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