Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff70d8d64ac5dac7…

MALICIOUS

PDF

74.6 KB Created: 2021-02-23 04:28:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4774fa7082a98f4515d84d8bb41740df SHA-1: cc1dd57a3a020c76d0a0cd1b1febfc43c7137f0a SHA-256: ff70d8d64ac5dac7f0405c9f3497968127b4b8dab806af550c3a827b58532608
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URL, which is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'free trx workouts pdf', likely to entice users to click the embedded malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/aws?utm_term=free+trx+workouts+pdf PDF link annotation
    • https://cdn.sqhk.co/dikizumi/gjjdCIa/bubble_fish_tank_tube_dunelm.pdfIn PDF document text
    • http://tukofiw.22web.org/janivewikewerak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462073/normal_600aeb5260a44.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/ideASid/awesome_tanks_2_unblocked_66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492246/normal_5fc766eb7dc44.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/eDENghQ/business_strategy_examples.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490377/normal_5fccf903ae969.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475874/normal_5fe19358802c7.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/NBhd6HU/lopagekaxomabafule.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/7TRticT/pentagon_jr_aew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_5fd62c947c917.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sibubixusa.epizy.com/weber_spirit_ii_e-310_price.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/2014_cadillac_cts_coupe_performance_vs_premium.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/749039301.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/does_papa_johns_thin_crust_come_with_garlic_sauce.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/pajujemeni.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/alta_snow_report_today.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/fair_work_australia_casual_contract_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/speechless_piano_sheet_music_aladdin.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_off0000e8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8ED 4972 bytes
SHA-256: 5b72f7eb0adc573f51a8db1b784717daa3a7001022e8bb41dc755527e25c6dec
font_01_sfnt_off0000fa07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA07 10256 bytes
SHA-256: 69da1c44c3790844c218f8ef470948c8482c94962ac74a57b18326ca4cf936ef

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