Malicious PDF — malware analysis report

Static analysis result for SHA-256 a647151f53862a6c…

MALICIOUS

PDF

72.7 KB Created: 2021-03-10 05:25:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 40b673df7142bab1b5ae1569ade64d86 SHA-1: dbe3fee546bc600808721a7abddb23045e7c9af0 SHA-256: a647151f53862a6ca8a8aac6978e44cc884a794ba1f6cc7d0009b9b8133e8c58
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or redirectors, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'Nespresso lattissima descaling pipe' and 'wkhtmltopdf', likely a lure to direct users to malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://druttle.ru/strik?utm_term=nespresso+lattissima+descaling+pipe PDF link annotation
    • https://cdn.sqhk.co/xoxamomajil/gehigh4/word_nut_game_stuck.pdfIn PDF document text
    • https://cdn.sqhk.co/zemakojunil/jaqNCie/xizifatapunejivelozas.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/jfgeLhf/zombie_survival_wasteland_apk.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/15370526439.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/hvgiiTe/redream_wince_not_currently_supported.pdfIn PDF document text
    • http://mukumalatixuji.iblogger.org/ww2_us_commando_survival_battleground_mod_apk.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/will_there_be_a_jacob_and_renesmee_book.pdfIn PDF document text
    • http://domobifotuza.sportsontheweb.net/redirovusivenoperifeb.pdfIn PDF document text
    • https://cdn.sqhk.co/varaxupumami/dCWDKhh/22394237334.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/jejhigY/prodigy_math_game_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d970ef47-996c-4ba4-bf37-a32e19e04002/11889082186.pdfIn PDF document text
    • http://tirevotijo.epizy.com/ac_market_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3d2ab6c-1418-440c-a678-00565558039c/how_do_prayer_beads_work.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/apache_poi_read_excel_file_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/agnes_martin-_lugand_books.pdfIn PDF document text
    • http://pezamax.myartsonline.com/56114491275.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/62846925149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3a8814d-9a64-447a-8430-33001ac641fa/risar.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/zelda_majora_s_mask_3ds_guide.pdfIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/52714003259.pdfIn PDF document text
    • http://refuzopil.epizy.com/88808697935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1f56b4-e9c1-41df-954f-b48e5a5efd1b/call_of_duty_cold_war_upgrade_weapons.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD046 5148 bytes
SHA-256: 8cac7066e41613bc016193f8fcd4841b6c7a1803d2cdc72fbfbde5353f529c9c
font_01_sfnt_off0000e1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B1 10488 bytes
SHA-256: 41168647b613ccb3d561ea811af69388eb56fc85051be506c09ea4877c48351d
font_02_sfnt_off0001057c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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