Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0862cc0d835177…

MALICIOUS

PDF

77.0 KB Created: 2021-03-09 11:09:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 300dab2a5dc8235488e807dbfb7538ed SHA-1: dae96a613e1ca3a05b7185d26fe05ad6313f6cd1 SHA-256: aa0862cc0d8351777050ee0fc681c6bd7485467d3b187e91f8e1e72469592bd8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs users to a URL designed to mimic a search result for commercial products, likely as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the detection suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/wix?keyword=mclean+wire+wheels+center+caps
    • http://abouts.space/86663347994ma77v.pdf
    • http://bigakeka.iblogger.org/kenmore_front_load_washer_wont_spin_or_drain.pdf
    • http://faponabon.mygamesonline.org/pdf_to_autocad_converter_with_scale.pdf
    • http://gufufisazikoja.iblogger.org/guzamuxamegulariwoxozapez.pdf
    • https://cdn.sqhk.co/savunowudob/hgEejhg/mp3_music_player_application_download.pdf
    • http://introdom.ru/baby_cartoons_videos_freejyz75.pdf
    • http://kokijejon.22web.org/79123819400.pdf
    • http://puzuxozazepeme.22web.org/cuales_son_las_unidades_de_temperatura_y_sus_equivalencias.pdf
    • https://cdn.sqhk.co/puzokopu/xXkgfja/varobinaxaxelize.pdf
    • http://cz-nitrof.website/3212506103191pgk.pdf
    • http://jazovez.iblogger.org/does_ashton_drake_offer_free_shipping.pdf
    • https://cdn.sqhk.co/fomavulobet/jdVjagj/48346669320.pdf
    • http://rezumitisud.mygamesonline.org/ibps_guide_2020_banking_awareness.pdf
    • https://cdn.sqhk.co/wikepijosipi/fIkahe1/hashtag_generator_app_android.pdf
    • https://cdn.sqhk.co/fukafodifi/ihiglTy/guserogefovuvinilinom.pdf
    • http://khareedforosh.com/sixosotabakinefugozepidivh4skc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lodumojokexiku.onlinewebshop.net/how_do_you_write_a_self_appraisal_example.pdf
    • http://dosatetirudipu.epizy.com/blackpink_in_your_area_tour.pdf
    • http://jugoviki.rf.gd/computer_repairs_prices_brisbane.pdf
    • http://gumelojapa.epizy.com/62193985553.pdf
    • http://lezebotetojezaz.epizy.com/nilolegataparitofa.pdf
    • http://wuxojawe.epizy.com/lalinevoladijagilafixow.pdf
    • http://gomiguru.epizy.com/verithanam_song_lyrics_in_tamil.pdf
    • http://wadoromutisagar.myartsonline.com/34224026751.pdf
    • http://dujisuga.epizy.com/53477789350.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df48.bin
c10bdf8dc33c6a2b80de1e8674a018df0d62a992e6d43a73990163ddc6ff40d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF48 5120 bytes
font_01_sfnt_off0000f0c8.bin
01545f21573c1a12ce74d24b0801421a36a35e5b8537c28c436552ed337072bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C8 17980 bytes

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