Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75a1579c5feb599…

MALICIOUS

PDF

104.2 KB Created: 2021-04-03 21:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: de1e77cdd5c668b826592f93ab08d9ae SHA-1: eee52ae9eefd96d4367272f966c7fa69a4823939 SHA-256: a75a1579c5feb599f065a2dc68dde8347b49fa85a0a3af08eeceb17271ef10d0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites for credential harvesting or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://golowaki.ru/award?keyword=bhagavad+gita+chapter+2+pdf+telugu PDF link annotation
    • http://dusibarupuguli.medianewsonline.com/digital_marketing_strategy_examples.pdfIn PDF document text
    • http://wigomufeze.22web.org/genidozutosefatopuba.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/carotid_artery_doppler.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/3070155981.pdfIn PDF document text
    • http://libifutolile.iblogger.org/area_and_perimeter_and_volume_formulas_for_all_shapes.pdfIn PDF document text
    • http://sopafekidis.sportsontheweb.net/32810118142.pdfIn PDF document text
    • http://fasumidivojasuj.iblogger.org/metric_length_conversion.pdfIn PDF document text
    • http://zeludupixejufi.medianewsonline.com/behind_the_bars_brittainy_cherry.pdfIn PDF document text
    • http://didazema.mypressonline.com/wojataxamo.pdfIn PDF document text
    • http://mowogaw.mypressonline.com/customs_union_russia_belarus_kazakhstan.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/california_general_durable_power_of_attorney_form.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gofuvosopo.epizy.com/wesowalabaxasib.pdfIn PDF document text
    • http://kudetewususitup.rf.gd/briggs_and_stratton_3500_watt_generator_specs.pdfIn PDF document text
    • http://sijisizaf.rf.gd/premiere_rush_free_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/eaton_fuller_13_speed_service_manual.pdfIn PDF document text
    • http://likasuretaw.onlinewebshop.net/tetasujagodavijesiralenu.pdfIn PDF document text
    • http://bikaduwixunu.epizy.com/44019375209.pdfIn PDF document text
    • http://benamow.myartsonline.com/kigojas.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/indian_bodybuilding_diet_chart.pdfIn PDF document text
    • http://desejole.myartsonline.com/45005203949.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/baal_veer_returns_episode_23.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/religion_what_does_it_mean_to_me_essay_brainly.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
stream_005_off0001574b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1574B 19684 bytes
SHA-256: a1a4efe09879203ca369bbe9976f389a8dcf189f0648fb00c92ff87db1f2b1dd
font_00_sfnt_off00011f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F34 5480 bytes
SHA-256: bfd5c6ff72a24b690f6e3a13f8a59cd26698fa278e790f0c9b372dd0ad36b231
font_01_sfnt_off000131eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EB 11956 bytes
SHA-256: bbf0b220a0e26ed1aaa75b026ed850f2e1c28249d1006b2ae163178d92dab92d

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