Malicious PDF — malware analysis report

Static analysis result for SHA-256 db10735a2144e6fc…

MALICIOUS

PDF

68.9 KB Created: 2021-03-04 13:16:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 244c3fa799ecb2f6310c3883df554548 SHA-1: 5f822c122c670e283bd8fcaff4df246231f752b0 SHA-256: db10735a2144e6fc62aa0d0945059ab44f4192d15c8efda124e11b594fa2c8b4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://baarspo.ru/123?utm_term=goat+simulator+2+player+split+screen PDF link annotation
    • https://silosapa.weebly.com/uploads/1/3/4/5/134580216/1882462.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/how_to_use_hero_3_as_webcam.pdfIn PDF document text
    • http://bejawutipage.mywebcommunity.org/the_hunger_games_mockingjay_part_2_full_movie_watch_online_free.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/no_eye_has_seen_nor_ear_heard_song.pdfIn PDF document text
    • https://vanosejifewufe.weebly.com/uploads/1/3/0/8/130814052/dcf1578.pdfIn PDF document text
    • https://tejukikefuxod.weebly.com/uploads/1/3/4/7/134703803/04548e8dc21.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/5ea89ef7-4713-4a4f-aeef-7ffbb32ee39a/pejipurefo.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/maths_construction_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/free_after_effects_templates_photo_book.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/55198136721.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/aristotelica_display_font.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/ancient_indian_history_mcq_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b783a3d-702b-40ef-b0ba-512997fd168b/3148399542.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/mandala_bed_sheet_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/getuvudoziwebedetufoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db80d65-2116-4f4d-980c-d69d61496acb/how_to_clean_oreck_air_purifier_cell.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/mefijusomibere.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/adm_apk_mirror.pdfIn PDF document text
    • http://tokozod.myartsonline.com/38720312902.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/cdcms_report_url.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/bhagavad_gita_telugu_audio_free.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_off0000d1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B4 5344 bytes
SHA-256: 548dfaacb313827ce710f731a68548d3b6d68dfb81678d0d9fd13ebd21ad6209
font_01_sfnt_off0000e3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D9 10164 bytes
SHA-256: f28c3acd666a3823108c38f2afcdaebc28dcbfac70b9ac02a3bce9dcb7ab478f

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