Malicious PDF — malware analysis report

Static analysis result for SHA-256 364c8354a2bb31d3…

MALICIOUS

PDF

77.7 KB Created: 2021-03-14 14:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 70fad474eba95b77780f9917d6c0cfd8 SHA-1: 313f58cb7ee9058995e0c3bad048234502c83261 SHA-256: 364c8354a2bb31d3010f2b3d6f06f085ae485cf7c59637a5d5dd84b90ccad219
156 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 ClamAV and 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 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://zajinet.ru/award?keyword=4+phases+of+cardiac+rehabilitation+pdf PDF link annotation
    • https://zipesonavizi.weebly.com/uploads/1/3/6/0/136052153/1205101.pdfIn PDF document text
    • https://bovebonidufos.weebly.com/uploads/1/3/1/4/131483372/mowuvolokip_koxapux_rusum_kevaxu.pdfIn PDF document text
    • https://zogugixuwomu.weebly.com/uploads/1/3/4/2/134234599/tubonegaxoruko.pdfIn PDF document text
    • https://rujuramokukavet.weebly.com/uploads/1/3/0/7/130739146/7fa979b29832c04.pdfIn PDF document text
    • https://bobujiwa.weebly.com/uploads/1/3/1/0/131070874/2298819.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/gosonifujasojekis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24fbc8c4-b6dd-41c8-bcbf-016b36b3a7e5/how_to_make_beets_plant.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/video_twitter_apk_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/gifam.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/korean_face_mask_sheet_for_oily_skin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/844205ce-2959-4976-b3e7-87baa81627d4/74321249485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d71f1e51-a72f-4ef5-bb2d-890e62d44d6c/physical_appearance_of_rainsford_in_the_most_dangerous_game.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/language_files_materials_for_an_introduction_to_language_and_linguistics.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/on_my_way_remix_da_tweekaz.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/cch_chuyn_nh_t_sang_jpg.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/alexander_the_great_name_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a54768f-cf47-418b-8f1d-d52040ec26b9/seth_rogen_celebrity_net_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/45702410681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3de70e6-27c3-41e6-bff8-ba211ba84052/which_electric_motor_is_most_efficient.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80516f61-a109-4c05-b0f0-bb65b7c0b560/arfken_mathematical_methods_for_physicists_5th_edition_solutions_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9397aa05-70a0-4826-8874-2b2fe199f73d/43969593133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4816b7-deb7-42a2-b564-3ce31293ca50/the_communication_age_connecting_and_engaging_2nd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/bambai_tamil_audio_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/tinixegibusesikarogi.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/meeting_schedule_templates.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_off0000f0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 5376 bytes
SHA-256: 60f2abaacb9fd76c49599449ca06c15fc34a47b315fc3eef3407e8b2f9af840d
font_01_sfnt_off000102e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E1 11004 bytes
SHA-256: 4d5e9cec2a570f3979ee9517496b5279575a4f992a38bd29598486245d7e1eb7

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