Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d1287278dac20de…

MALICIOUS

PDF

79.9 KB Created: 2021-03-07 15:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a6b5793e981e37aa4c43b3ac15734a62 SHA-1: b03d11af7dccd62a49b5f8b3c8109b545fe08c7d SHA-256: 8d1287278dac20de8863e27ddf806badf9fab8347de3e3d4720ed530df72a388
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, https://xajibur.ru/123?utm_term=simulation+and+simulacra+jean+baudrillard+pdf, is particularly suspicious and likely serves as a redirector to malicious content or phishing pages. No scripts were extracted, but the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/123?utm_term=simulation+and+simulacra+jean+baudrillard+pdf PDF link annotation
    • http://xowimixipivup.22web.org/download_lagu_anak_asmaul_husna_mp4.pdfIn PDF document text
    • http://soldonlittleton.com/assassin_leveling_guide_ragnarok_revo_classicvf524.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/is_superior_spider_man_in_earth_616.pdfIn PDF document text
    • http://qiwi-wallet.online/figurudunarexuziwipek7ki7u.pdfIn PDF document text
    • http://trenolgia.buzz/les_miserables_movie_2020_watch_online0ijrq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba99092-8f74-47be-807f-6177dde6584f/human_trafficking_in_the_united_states_essay.pdfIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_71cf734b9af54572b5ac9610a91c7780.pdf?index=trueIn PDF document text
    • http://zobawukesilebaf.epizy.com/in_the_unsaturated_zone_the_pores_of_the_soil_are_totally_filled_with_water.pdfIn PDF document text
    • https://584dc5e1-4449-4bca-b3d9-d0e1fa08a972.filesusr.com/ugd/185caa_1075b77aa4e84665ba58b90ff4d7f7ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/gimisorufugar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/578334cc-edba-4ba9-a938-bb52e0c7e5db/zeganubudupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cb8bc8c-c757-4a47-9a57-da15c77ad217/informative_speech_topics_for_high_school_students.pdfIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_725236fca26946c88d29a17392573a1c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e29f9d79-ca1a-473b-9505-010e90749b42/how_to_choose_living_room_furniture_color.pdfIn PDF document text
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_e2bf0109ac4144d8af9ddf161630a678.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vapite/teaching_idioms_2nd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/what_does_interdependence_mean_in_an_ecosystem.pdfIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_45a8f39548684ea8955d9433c4f5ca6a.pdf?index=trueIn PDF document text
    • http://dogiwexor.myartsonline.com/cobra_29_ltd_classic_delta_tune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fca677c3-a55c-445f-8635-774755c0599c/fiddler_on_the_roof_song_sunrise_sunset_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/hwy_63_alberta_road_report.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_off0000fad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD2 5620 bytes
SHA-256: 58d8ff453313599213a329132c7aa256d1c809b74782a8c0bfd11c7d037afc97
font_01_sfnt_off00010dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD1 10508 bytes
SHA-256: 1c2855dab49f7747b56a8035cc2c528a431cd6e7992510b56bb29f4bd34d654c

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