Malicious PDF — malware analysis report

Static analysis result for SHA-256 671756769d9631ed…

MALICIOUS

PDF

75.3 KB Created: 2021-03-12 04:31:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7e2c3546fb66e02c42756e50d6a2573d SHA-1: 1138d4ac9732db7fa67f3e54712c111bab084c6e SHA-256: 671756769d9631ed50bc600bcb801c6f7e85594b05561aae72d26d90382c5b4d
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 0.9995

Heuristics 5

  • 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.
  • 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/wix?keyword=periodic+table+scavenger+hunt+answers PDF link annotation
    • http://kepukarob.sportsontheweb.net/pokemon_sun_and_moon_cosmic_eclipse_card_prices.pdfIn PDF document text
    • http://zedateve.mypressonline.com/96227485483.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/supix.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/uses_uracil_instead_of_thymine.pdfIn PDF document text
    • http://xemakaze.mywebcommunity.org/spoken_english_for_beginners_free_download.pdfIn PDF document text
    • http://medyayazilimtr.com/american_idioms_and_phrases_with_examples_for_ssccgtyl.pdfIn PDF document text
    • http://cosmeteca.com/baofeng_uv-5r_plus_programmings5eue.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/wujapu/id_card_design_template_ms_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4a83a4-dcc5-4fd6-935f-8978c87a0e9a/how_to_setup_universal_remote_to_sony_dvd_player.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/jofuzoxepukipa.pdfIn PDF document text
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_868616d4897144c9844596fd7e09f15a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/annamalai_film_ringtone.pdfIn PDF document text
    • https://4694dce0-4d1e-4c77-b4da-d1f025f82355.filesusr.com/ugd/fb332b_53eb86c7f9c64774a7a5b6d746a6a668.pdf?index=trueIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_6aa5365a2e20402e9a868800415380e8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/954d5d54-f0cc-44d8-8573-2d4c375c7028/which_of_the_following_is_not_an_example_of_a_high-level_programming_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6744133-68c3-4142-a644-3198301c8092/does_magic_mouse_2_work_with_macbook_air.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/algoritmo_de_dijkstra_ejercicios.pdfIn PDF document text
    • http://vunonam.atwebpages.com/less_than_zero_watch_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddc21d18-f6cc-4639-8d03-1eabf7929327/kitchenaid_pro_600_refurbished_review.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/tapepumusan.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/rusod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61138d27-6c39-409f-aa32-f40b0b40ce3c/nordictrack_exp_1000x_treadmill_manual.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_off0000e982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE982 5492 bytes
SHA-256: d91be27166678fdbaf2ee715416c71b002f4d92512dca49191e8a98326fb37ed
font_01_sfnt_off0000fc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC34 10328 bytes
SHA-256: 0f4875c0393e8111df791ab5dda3f454e384253d605113e6601c8544efc49cf0

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