Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b14cbe798768221…

MALICIOUS

PDF

94.9 KB Created: 2021-03-25 06:37:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2b7dcafe1438aaff5e437ea279ad8556 SHA-1: 1ccf736774f341c0bac982d5a786a24921885987 SHA-256: 9b14cbe798768221b88c94da3f23b08f6235f66b94b1c5dc5c918d4bd26c81ef
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the presence of numerous external URLs and the heuristic firings for link farms point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://leonvi.ru/wix?keyword=functional+harmony+jazz PDF link annotation
    • http://vinnipoh.fun/m_audio_axiom_49_driverse612v.pdfIn PDF document text
    • https://cdn.sqhk.co/woluzadeviv/gjihria/nursery_rhymes_for_toddlers_baby_shark.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/jihbhis/how_to_play_spades_card_game_4_players.pdfIn PDF document text
    • http://zavodtriumf.com/showa_a_history_of_japan_summaryi72bv.pdfIn PDF document text
    • http://bigtittybella.com/piluxitefenesabatrr.pdfIn PDF document text
    • http://rating-bookmaker.ru/670414357sg6z6.pdfIn PDF document text
    • https://cdn.sqhk.co/pelopuxi/WlgggdR/kilaj.pdfIn PDF document text
    • http://forecast.bet/articles_of_association_template_estoniaha9d8.pdfIn PDF document text
    • https://cdn.sqhk.co/mobirewin/hiHAicR/mugokinugegofilovenoti.pdfIn PDF document text
    • https://bizonununifewe.weebly.com/uploads/1/3/4/7/134773553/11f565.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/iiZvSjc/metformin_hcl_side_effects_rash.pdfIn PDF document text
    • https://rimivitelur.weebly.com/uploads/1/3/0/7/130739194/demaxewokokemavolesu.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/QJiihhT/4996375911.pdfIn PDF document text
    • https://cdn.sqhk.co/metevetufi/mdhahbq/dowuzunekafax.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://uploads.strikinglycdn.com/files/c2794c6e-1cf4-47d4-bab7-544102038adb/rice_to_water_ratio_for_tupperware_rice_cooker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/566576dd-a5a8-45b0-9017-f66f80d74ac9/niluxofexopaganavanelosuv.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/false_gods_graham_mcneill.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/ludafejimozefizadel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd8b516-0957-459b-8598-d12a17c04bf8/the_dream_giver_book_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/daniel_plant_killer.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/google_ads_fundamentals_certification_assessment_answers_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/college_student_internship_resume_template.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001033f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033F 4808 bytes
SHA-256: 99d4ef7648cbec924893c1df6a1c68d9109cc6756613c89c6ad1bf919fb70374
font_01_sfnt_off0001135c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135C 3020 bytes
SHA-256: 98da5072a2bd80a3227d4795bcc474ca0ef44a897143498b78186679176079b4
font_02_sfnt_off00011f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F95 11476 bytes
SHA-256: 184e6906668f32aa85faa7d1af725e601f3d86382c470716037ce80e0bf89ffa
font_03_sfnt_off00014708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14708 16508 bytes
SHA-256: 7ed4e24155dc8e0cd974aadd07972faa3172e4000ee824bcfb6d291fcacec645
font_04_sfnt_off00015dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DAB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.