Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1f4352cf28eb4c…

MALICIOUS

PDF

82.0 KB Created: 2021-03-31 00:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0174654c6b0fe5cffd8867a43ef1b594 SHA-1: da1f736e1ecebc21305a8bfa57a09e8fb5a3bf0e SHA-256: 3c1f4352cf28eb4c442887d984f771c2e4b1aeb2399e3c00f17cf6a709eb7d02
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://gimoguvi.ru/strik?utm_term=what+is+leather+ball PDF link annotation
    • http://potenciy.xyz/sibubunufarukoii7dp.pdfIn PDF document text
    • http://afracheat5.xyz/bergeys_manual_of_systematic_bacteriology_volume_1_free_downloadjplqj.pdfIn PDF document text
    • https://xikoroto.weebly.com/uploads/1/3/4/3/134338579/b81655.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/3Tibjiv/trap_world_cup_2019_date.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/jbjKkhb/iptv_extreme_pro_99_mod_apk.pdfIn PDF document text
    • http://topuniversityru.fun/beethoven_piano_sonata_no_16_op_313x3kf.pdfIn PDF document text
    • http://fitokaps.xyz/vivibekajagelidopekugaweffc4z.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/Whggdii/starfall_abc_letter_h.pdfIn PDF document text
    • http://sun-italy.space/41164230071zeck2.pdfIn PDF document text
    • https://figurera.weebly.com/uploads/1/3/4/4/134437403/mijexawaful_rikibebo.pdfIn PDF document text
    • https://jinozeposejide.weebly.com/uploads/1/3/1/4/131453810/4561500.pdfIn PDF document text
    • http://pufegusikozig.22web.org/mcgraw_hill_4th_grade_math_book.pdfIn PDF document text
    • http://1gusevshop.space/bootstrap_3_collapse_jszmfj0.pdfIn PDF document text
    • https://cdn.sqhk.co/xafeperale/yo2ghjc/questionnaire_for_ice_cream_shop.pdfIn PDF document text
    • http://meriline.store/dadekezasisukosexxt6oz.pdfIn PDF document text
    • http://milanbeachs.space/how_to_clean_wolf_oven_grateskalp4.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/gcFibji/meaning_of_the_word_james.pdfIn PDF document text
    • http://tonalemeketav.66ghz.com/hssc_self_declaration_annexure_e1.pdfIn PDF document text
    • http://e-devletodeme.net/76493323731wy4hy.pdfIn PDF document text
    • https://pakajifovajopif.weebly.com/uploads/1/3/1/6/131607230/nusagodoborazox.pdfIn PDF document text
    • https://lalojitewimagix.weebly.com/uploads/1/3/5/3/135304200/f1ad2.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/adb8d86f-185a-413f-988e-af90c996c647/jimos.pdfIn PDF document text
    • http://miseparasunafit.rf.gd/teziwuzibolapami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28501c9b-f307-4168-93e0-ae75ccb740fb/public_relations_salary_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f07066b-d3c2-44bf-9797-2ac7e39097d5/maytag_dishwasher_diagnostic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c3e62b-222d-48e4-ac8c-945a12d9830c/75714025139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b455ae82-7132-4699-bc73-185036a69d79/what_is_meant_by_rural_and_urban_areas_are_interdependent.pdfIn PDF document text
    • http://wuboxobotuz.rf.gd/39161511434.pdfIn PDF document text
    • http://xokovuwewa.epizy.com/recuerdos_de_la_alhambra_guitar_tab.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_off000101e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E5 4928 bytes
SHA-256: d6c5d919a3a1de63b833c9c873407093cd4d01987ef73a0a8993c6ca3a1eb356
font_01_sfnt_off000112a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A9 11200 bytes
SHA-256: 5ce17c90e609db6f2d0b5e96530dfefaea957611a0ac3a61948ba30e05e62ce2