Malicious PDF — malware analysis report

Static analysis result for SHA-256 df3ce4833f88d253…

MALICIOUS

PDF

80.4 KB Created: 2021-03-20 03:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 376164287a7afd5f7b52513428d09518 SHA-1: 87dffa7fa830b43f0d257ce2d588a056ca8dacd6 SHA-256: df3ce4833f88d253c0c0acfad92fdb63d89a356ba1c0af938f09a0c48513ee53
96 Risk Score

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 0.9994

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://fokemale.ru/123?utm_term=australian+army+dress+uniform+for+sale PDF link annotation
    • http://nonly.xyz/todovopezibenok5nw0s.pdfIn PDF document text
    • http://tehnotop.space/caller_id_spoofing_android1su1p.pdfIn PDF document text
    • http://retys.fun/burezuyg6k5.pdfIn PDF document text
    • http://vugiris.22web.org/porejiwuvekokew.pdfIn PDF document text
    • http://jaxijozurisikiz.22web.org/65430012689.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_fb2c168917de4d7d972778e7e0bb420b.pdf?index=trueIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_229bdadf065c40cf959016053fcdd951.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wegugus/sorusejolapuse.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/scholastic_guided_science_readers_animal_set.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/77347399567.pdfIn PDF document text
    • http://refofigeto.epizy.com/30211269416.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/60620312253.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/carbonite_availability_data_sheet.pdfIn PDF document text
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_dea25c28e4294bbf8a4762ed6b2bf00f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/is_the_shining_on_netflix.pdfIn PDF document text
    • http://zirafefovijab.epizy.com/manually_update_wink_hub_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/the_tattooist_of_auschwitz.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/aggresome_formation_pathway.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/fire_emblem_three_houses_characters_guide.pdfIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_34b17a3c9bbc409da5573327e27c2fcc.pdf?index=trueIn PDF document text
    • http://kawojimulogizef.rf.gd/nofoxaferisesunutodowiva.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/sword_art_online_alicization_lycoris_xbox_one_multiplayer.pdfIn PDF document text
    • http://navibizo.rf.gd/56512977334.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_off0000fd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD75 5144 bytes
SHA-256: bf85b01220d9a28f96134dfb253f4fe996c5df94532e34d43ed95db34ddd35a6
font_01_sfnt_off00010ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE5 10916 bytes
SHA-256: e3cf873196616a4fcc04556e68104ff913a5abda6cd9ffb6bbdc8f0ea80d8ecc

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