Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf6a129d54efb3d…

MALICIOUS

PDF

89.7 KB Created: 2021-04-01 19:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1be8689ee2a67e5ebf8971dea95a196f SHA-1: 10306dba6d24dcdb822374b8c0cbf7c2c550b7b8 SHA-256: daf6a129d54efb3db0b051d3d55f1dd7434000305959d7fb8cfc51cdf25697e3
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 0.9991

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://jottigo.ru/123?utm_term=advantages+of+using+internet+pdf PDF link annotation
    • http://easylearning.space/gevikazetilu9lyow.pdfIn PDF document text
    • http://padlamadla.site/hp_elitebook_6930p_power_adapter94mun.pdfIn PDF document text
    • http://tesar-krd.ru/22438654394xpsev.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/ae2ad43d-b74d-430f-84e0-ede838c1ce06/jugixikitijajomaz.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/13217510449.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/kolotiberanerom.pdfIn PDF document text
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_c47c905f05964f099fdb23a03a3bc7cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefabe/37620573770.pdfIn PDF document text
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_65708a804e414f52b149688d153b098f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3ff528-d9b8-4556-96ba-2c9fce3be6f0/brother_hl-3170cdw_reset_toner_counter.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/wununonalokur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95fb2738-db6b-485c-abf4-44db0bc099b2/walmart_tire_black_friday_sale_2020.pdfIn PDF document text
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_432af25ccff442efa1f27933ec4f2632.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lofese/35886126165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9448d863-1943-44d6-83d2-b136e12db529/99448742880.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/la_la_land_theme_song_violin_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de696f5a-bc54-46a4-808b-d03132e28956/vipifil.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/74521110693.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/43930498272.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/free_broken_arrow_1996_movie.pdfIn PDF document text
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_b7576807914a4ded9649d6d259fe1be8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/22770951811.pdfIn PDF document text
    • https://801a9f91-e12c-4b3a-b535-42c3eaff61c8.filesusr.com/ugd/d237ef_28b1d25348b045d5a0c3f6928b041a45.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxelula/54225286831.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_off000120f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F7 5228 bytes
SHA-256: 9dccae00838be644dc3a5871a94660765140c770822f883b871448951a369227
font_01_sfnt_off000132db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132DB 10784 bytes
SHA-256: e4ade93d124f0de23301b6166bf4c1bf577ef6630ffb2f729a819eb34104a47b

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