Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b470e6a94699dd5…

MALICIOUS

PDF

81.7 KB Created: 2021-03-06 05:19:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6173326a3a2ad37608e8d0693c008fc9 SHA-1: 0a463a075ddaf2cc56b5dad5608350a020e56e7d SHA-256: 5b470e6a94699dd53624f5b8cd22808572cbd0e2a8f06026eeb4a091d0c0462e
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, and is identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for SEO manipulation or phishing. No scripts were extracted, but the primary attack pattern involves directing users to malicious or deceptive external websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/wix?keyword=kenmore+plus+electric+stove+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421342/normal_5fec556c309b8.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/ipad_mini_newest_model_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381101/normal_5fc7d5338bb5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366400/normal_5fdef5f873e40.pdfIn PDF document text
    • http://mavedelusudefiv.22web.org/schwinn_fitness_230_home_workout_stationary_recumbent_exercise_bike_with_display.pdfIn PDF document text
    • http://jebebixazonutug.mypressonline.com/only_love_is_real_quotes.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
    • https://d5aacb37-8766-4234-9cc8-c2ec3b911aba.filesusr.com/ugd/1e723b_e46c118a40e548f9853d04fe0d4746e5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05978539-511e-45f8-8549-e653c760f147/acer_screen_no_signal_hdmi.pdfIn PDF document text
    • http://mujuvuxi.epizy.com/totixuvelewatofetowikemir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66aa2aaf-4d10-4e75-9c4f-248043c6e536/gonozarotarezolokisalag.pdfIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_79909ab9ed6847c6bda95316c633a5f9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ee87fd-1631-44a0-8e1a-6abeb21e65fb/fekalomubofazesosur.pdfIn PDF document text
    • http://mepitar.atwebpages.com/58561995329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec318eac-912c-4478-8280-1ab586f34044/lg_inverter_v_heat_pump_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/474bd543-4fa8-4f1b-96fc-c5b9b440bb09/fekegasasudazekil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01338c93-12d6-4801-815c-b37451d61457/24705955534.pdfIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_8743ed039c094791a20cd51c61786003.pdf?index=trueIn PDF document text
    • http://wipapirub.epizy.com/sherwin_williams_loxon_s1_data_sheet.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_cb6b6c93dd1d40f4b36d9f753b208822.pdf?index=trueIn PDF document text
    • http://pewusufep.epizy.com/39701999410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df602772-e040-4d7c-aea5-d1a6f87a7462/burger_king_breakfast_canada.pdfIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_d5a4afdb582b45c8b6f20f945f03c105.pdf?index=trueIn PDF document text
    • http://jibitolokadidus.rf.gd/zozilugasifitimofazasoxep.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_off0000df61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF61 4988 bytes
SHA-256: d2f0d6af8ae513b0c783503613b522427b8f07e3553809029b910937ac2527b1
font_01_sfnt_off0000f044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF044 10808 bytes
SHA-256: 92c07a4a994b5f6d68a46a3b0ac94dc2993d7e75a91d7ea02966bc5d997fd775
font_02_sfnt_off00011576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11576 16144 bytes
SHA-256: 89fb4cb0e03d0651222735942ed00a203783669e61652b29c0ae4e378b8446a7
font_03_sfnt_off00012a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A49 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176