Malicious PDF — malware analysis report

Static analysis result for SHA-256 19a023edd1ed5dbc…

MALICIOUS

PDF

71.1 KB Created: 2021-03-09 07:14:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 15be1635aebb38b61d74acdfd703af61 SHA-1: cc6f0c471a39b493c4b048e7f8f412c2b08152a2 SHA-256: 19a023edd1ed5dbc6b428e4af189bec74ffaad41637a379c8eb47df0b6367dd9
126 Risk Score

Malware Insights

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

The 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 domains and are likely used to host malicious content or redirect users to phishing sites. The document body, though heavily obfuscated, suggests a lure related to 'Avery template 5160 pdf', which is a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/award?keyword=avery+template+5160+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465557/normal_5fceb4b4d4085.pdfIn PDF document text
    • http://ziwewixowele.sportsontheweb.net/old_navy_customer_service_telephone.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/43226274263.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479691/normal_5fcd0ca2c8964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502245/normal_60402b181b8ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407777/normal_6028d2a811be0.pdfIn PDF document text
    • http://damewumesigalut.medianewsonline.com/livro_carlos_marighella.pdfIn PDF document text
    • http://iranomics.com/jutimugusexugasonjwvq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473031/normal_5ff6684d47246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_5fd65fdb691e9.pdfIn PDF document text
    • http://itdiscount.info/what_is_statistical_rate_theory_test8lvxm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_601672645190c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/adobe_illustrator_cs6_apk.pdfIn PDF document text
    • http://josesomesube.myartsonline.com/babufisakerirowudix.pdfIn PDF document text
    • http://kugukokoner.myartsonline.com/are_magic_bullet_dishwasher_safe.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/sozezeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/685ebbee-a859-4ba7-9872-d81fe59301d8/global_marketing_keegan_green.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/850756e8-0a85-4dd2-9bc2-408918c2af75/how_much_do_mcdonalds_employees_get_paid_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/sciatica_or_piriformis.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/cahier_des_charges_matriel_informatique_algerie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96463739-25aa-4377-af82-d9e4fd30cfc5/how_to_use_smiths_knife_sharpener_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c2b40f-41bf-4dd3-bffb-2de9548b119c/how_to_suppress_caller_id_on_cell_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8cee75d-4e9e-4013-85cf-2483fb196b8d/how_to_print_directions_from_google_maps_android.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_off0000da17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA17 5632 bytes
SHA-256: 384a51ce2ab06fbb772507374b3f1f7d915fb4594d9b2e69be69b62b2766acc9
font_01_sfnt_off0000ed50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED50 10016 bytes
SHA-256: 087c077919622543e3067853faffe56e4662b25d40bd093a5814eff4301c2c96

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