Malicious PDF — malware analysis report

Static analysis result for SHA-256 9377986489274df0…

MALICIOUS

PDF

69.3 KB Created: 2021-03-20 11:51:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 34701db5b41c661bd804200e0f859456 SHA-1: f96cdd2b5884e56dd9136035eca9b62d8b0896e8 SHA-256: 9377986489274df07b715827ba5c2dd7e08a6cafc3a8506f40296a558d893401
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, which is characteristic of SEO link farms or phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs and link farm structure suggest the primary goal is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://jumiwimov.ru/award?keyword=buku+paket+biologi+sma+kelas+11+kurikulum+2020+pdf PDF link annotation
    • http://mujogatebili.22web.org/rimalatival.pdfIn PDF document text
    • http://mewajopu.22web.org/batman_arkham_asylum_comic_espaol.pdfIn PDF document text
    • http://lifizix.22web.org/bokuvod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kixasudasiwub.epizy.com/skripsi_akuntansi_perpajakan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e9fa05-af60-4178-bf28-77389c28d475/echo_srm_230_carburetor_cleaning.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/62094807074.pdfIn PDF document text
    • http://rigeladujonij.epizy.com/64918058574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a3adb2-228b-4b57-ae68-8dff6b4b7d4d/faresajilotukoroziko.pdfIn PDF document text
    • http://gezojetisab.epizy.com/algebra_1_factoring_test_answer_key.pdfIn PDF document text
    • http://kamegowemegoguw.rf.gd/energias_renovables_en_honduras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3612eab9-fbcc-43e2-b8b9-4e0ad24ee84f/fuwekibefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/792d4a80-c134-4101-9643-bcb262ccaa18/26228202882.pdfIn PDF document text
    • http://kixurazo.rf.gd/fofojaxa.pdfIn PDF document text
    • https://621cd70f-1aca-46de-91df-1bd8162c3e90.filesusr.com/ugd/9f1ad6_ca69ace3e56c4dc1864ad201eba8aa8b.pdf?index=trueIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_0c52fa6c5d51433f81623a8606bbba3d.pdf?index=trueIn PDF document text
    • http://wevevaviz.epizy.com/segerazowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06d23cf-86df-4849-ab23-c5ec9c1b4957/kirby_vacuum_cleaner_supplies_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd56f2c-2000-43ab-8aba-e6fe6f2565e4/jimirirepugize.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/fawesetujikorefupanudij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6fdc8ff-6398-40ca-af6a-b5deb8acb915/78487235046.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/rokijedev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23970c6a-ffb4-4ea7-8ef1-dab725a0a2eb/madame_butterfly_snapdragon_seeds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4c7704f-0239-48eb-91e3-cfbff28e8ef4/john_deere_garden_tractor_replacement_seat.pdfIn PDF document text
    • http://zunebafovako.epizy.com/bali_road_map.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/seporuweposositusesulibof.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/40976426836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b158c56-ba54-4895-b6cc-c41b1cba4e77/87455268166.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_off0000d038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD038 5940 bytes
SHA-256: c584575500d7615f2f882493e11a8f96be5d95afb2b363304db9707158d27d44
font_01_sfnt_off0000e45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45B 9684 bytes
SHA-256: baf9f2884d0eb351aee7df3a44c888db82c8a59a216be333472e077d5bf33ee4

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