Malicious PDF — malware analysis report

Static analysis result for SHA-256 198fe5055f8e903b…

MALICIOUS

PDF

72.1 KB Created: 2021-03-08 07:47:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e2b607e531abf8998a5db12cf281f328 SHA-1: 2582eabd380a3bf777d696d0891872d9b4101684 SHA-256: 198fe5055f8e903b6cf28965050433600291e6c35ba22e5200f614f809891544
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable hosting, and is flagged by ClamAV as a phishing trojan. The embedded URLs suggest a link farm designed to redirect users to potentially malicious content, masquerading as search results for popular items. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate malicious intent for user redirection and potential payload delivery.

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://soxebez.ru/wix?keyword=the+memory+keeper%2527s+daughter+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489409/normal_601c86f6a5b65.pdfIn PDF document text
    • http://sdl-trade.com/75116657116b2iwh.pdfIn PDF document text
    • https://cdn.sqhk.co/mugodetutag/qjagjge/mobile_top_up_store.pdfIn PDF document text
    • http://damvglaz6.xyz/rainstorm_meaning_in_englishkh2pm.pdfIn PDF document text
    • http://totalcreditcheck.info/husqvarna_125b_leaf_blower_air_filterovea6.pdfIn PDF document text
    • http://nazhivy.net/bezefigawemasinorejimkrvl5.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/cAjhDsH/45900937210.pdfIn PDF document text
    • http://bitjoms.xyz/kenmore_elite_top_load_washer_ie_error_codexd88a.pdfIn PDF document text
    • https://cdn.sqhk.co/sivumazudi/hicpHfA/gezovawupexejen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462352/normal_602e9a89d5885.pdfIn PDF document text
    • https://cdn.sqhk.co/vapatibu/acPjijf/cube_survival_story_mod_apk_1._0._30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_600bffb190425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454668/normal_5fd62f9a6eda8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/41b75055-c9c0-4711-92b8-77cf6d694d83/vavim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43020623-20f3-413d-ac40-6a4f20e7978a/can_you_fake_tinder_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/168479c9-7ec3-46a9-9ef5-1db5a7f213d9/ap_language_and_composition_exam_sample_questions.pdfIn PDF document text
    • http://tunivepusage.epizy.com/92452691653.pdfIn PDF document text
    • http://divimoxigorube.epizy.com/what_does_water_under_the_bridge_mean_idiom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/219eb222-15d0-4568-b953-5ab11661f73d/the_panda_eats_shoots_and_leaves_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2444b26-af90-436f-a539-2a767d544c8c/does_brenda_die_in_the_maze_runner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c123903-63d5-43ea-8913-5beed99dfd30/what_are_the_7_habits_of_mind.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2993f657-702d-449b-b5de-95453740f112/dejejovukerun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55909373-c501-47c8-a8ff-bdecd59947b2/how_to_replace_igniter_on_ge_gas_stove.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_off0000dc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC75 5696 bytes
SHA-256: 9023f3e31ff93fb771946505e6c4f39ed8280e9ca0872240c9747049eaeb6b18
font_01_sfnt_off0000efd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD5 10244 bytes
SHA-256: 5712b4f2e39cb396893b38af99fe8d8ebe424584a9c8b5d4c1fbf38d1bd828c4