Malicious PDF — malware analysis report

Static analysis result for SHA-256 690e20110830319d…

MALICIOUS

PDF

78.6 KB Created: 2021-03-28 20:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 632f87883a26da918903c886d1faddce SHA-1: 81d97cc652643302fe927974c399d2f1fae9c185 SHA-256: 690e20110830319ded835eb67c0d096ac66747719bde33d146c6324790619c69
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm, with the primary goal of directing users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=where+do+beavers+badges+go+on+uniform
    • http://barcaporirternet-interbank-pe.com/582117338489bf92.pdf
    • http://tugeredenazej.mywebcommunity.org/a_room_of_one_own_virginia_woolf.pdf
    • https://cdn.sqhk.co/vomawoko/1zpghgk/39243406390.pdf
    • https://cdn.sqhk.co/sifajoxojif/dhehieU/wapogamu.pdf
    • http://bet-info.ru/63834548168mh49d.pdf
    • https://simepatu.weebly.com/uploads/1/3/4/2/134267103/sipojipoziweja.pdf
    • https://cdn.sqhk.co/rabuvimi/kUckgfa/crash_team_racing_nitro_fueled_pc_kuyhaa.pdf
    • http://realnoe-obshenie.online/cruise_automation_phone_numberlq66h.pdf
    • https://cdn.sqhk.co/vemegunir/ivjbSja/restaurant_renovation_game_cheats.pdf
    • https://wipevotabekux.weebly.com/uploads/1/3/1/6/131607119/2156662.pdf
    • https://vifapuxup.weebly.com/uploads/1/3/4/0/134018045/807db41.pdf
    • http://testertumentum.space/character_sketch_of_j_alfred_prufrockq6kkp.pdf
    • http://widonatozeg.mypressonline.com/chronicles_of_narnia_prince_caspian_full_movie_in_hindi_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/23fa717e-d381-4642-805e-f7d260e422ee/wovabixaje.pdf
    • https://uploads.strikinglycdn.com/files/b79d68ed-fe09-40d3-8902-d7303f4e9856/piwidere.pdf
    • https://uploads.strikinglycdn.com/files/939b7e21-74bb-4130-906a-ba34aba8c1df/polycom_soundstation_2w_ex_wireless_audio_conference_phone.pdf
    • https://uploads.strikinglycdn.com/files/18326c77-4bf3-4881-be5a-25daa7182992/star_wars_rpg_adventure_ideas.pdf
    • https://uploads.strikinglycdn.com/files/e84a8b5c-9f82-41c1-b901-ee8e0d796c0b/2230718035.pdf
    • https://uploads.strikinglycdn.com/files/d4d596b4-2fdb-4099-9b7f-f831459f6d68/dremel_flex_shaft_attachment_model_961.pdf
    • http://wawavaroxu.myartsonline.com/section_3._1_the_rock_cycle_answer_key.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e77a.bin
44be00afc42106a403ab7a6235c2552a2ca8b8e2f592f9347b181fb603f13c4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE77A 5304 bytes
font_01_sfnt_off0000f960.bin
40b4a1b1823461a911b3abc0e4e0e5c2c8c4c071f441838fae6bc98962fc1f38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF960 11088 bytes
font_02_sfnt_off00011ee2.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE2 4324 bytes

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