Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ca0d7083f4de34…

MALICIOUS

PDF

77.7 KB Created: 2021-03-19 14:07:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 082eac73e74de0063c17ed024f4f183b SHA-1: 1b74f9f47e5dd22946cd436382966f2b6718db88 SHA-256: 59ca0d7083f4de34f3cfe720e4d92956abffbb6929dd4a93f2b3c7b95dcf6953
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=idylis+if50cm23nw+manual PDF link annotation
    • http://medivifudofo.iblogger.org/former_employee_reference_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487625/normal_60532a37c33f8.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/negerutuxipugeka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415745/normal_604f1630815d0.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/brady_bmp21_plus_label_cartridge.pdfIn PDF document text
    • http://sorulaxawo.iblogger.org/89545768945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386839/normal_60148153492fb.pdfIn PDF document text
    • http://toluvubub.mygamesonline.org/fmea_aiag_vda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lolunoxij.myartsonline.com/imperative_exercises_multiple_choice.pdfIn PDF document text
    • http://bisetazixu.epizy.com/cbre_cap_rate_report_q2_2018.pdfIn PDF document text
    • http://tixefol.epizy.com/what_are_the_elements_of_quality_assurance_in_higher_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3570a2c9-bf08-4b1d-bca3-cac5767e3de5/el_pollo_loco_menu_chicken_wrap.pdfIn PDF document text
    • http://tosazakutug.rf.gd/tufusifinepezifus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ac9881c-448a-410c-bd01-5d7ee616a8b4/13658068341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0db9e4c-090e-4c39-9128-a42c66bbc36f/logo_design_competition_rules.pdfIn PDF document text
    • http://guduxakif.rf.gd/ring_size_guide_tiffany.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/14199954945.pdfIn PDF document text
    • http://pawuzax.onlinewebshop.net/regumesesojudigeke.pdfIn PDF document text
    • http://rebogarupoza.epizy.com/fios_wifi_6_router_yellow_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc09ec9a-45ff-4914-bdc1-d755080b7f39/sledziona_u_psa_polozenie.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17D 5336 bytes
SHA-256: b6be97bc4c98d4515c8c3bbb80af5f07c4b8e3526e014ce8758e269fa85914e2
font_01_sfnt_off0000e398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE398 9936 bytes
SHA-256: 193f3c0d216400155f6485925f37c5810b14046c1f5d39995b9cd3c3e68d7fad
font_02_sfnt_off000105d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D0 16196 bytes
SHA-256: 7279e17af1e02fd0f3ef997930705907ffabfba99e9efaabfaf00d6d06097595
font_03_sfnt_off00011b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B16 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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