Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1efcb288e7e5ce…

MALICIOUS

PDF

82.4 KB Created: 2021-03-14 09:18:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 23062b87c58cd8d225f1aa1fa25255d6 SHA-1: 8a4d439c8d67e0655c73de1f162e6c9709e9c826 SHA-256: 8e1efcb288e7e5ce15a2d9a248dfeefb257f0b3af1ccd45bd27c351ae33ff006
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 0.9996

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://lozipotod.ru/123?utm_term=powerdirector+pro+mod+apk+android+1 PDF link annotation
    • https://xadixolikiz.weebly.com/uploads/1/3/1/3/131380305/latutuzunuko.pdfIn PDF document text
    • https://cdn.sqhk.co/bobofibu/dijidhb/wormate._io_mod_apk_unlimited_money.pdfIn PDF document text
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/tifumufesojop.pdfIn PDF document text
    • https://cdn.sqhk.co/vabadoma/cCfl4ii/21384833487.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/2jaNijO/real_offroad_simulator_3d_2020_mod_apk.pdfIn PDF document text
    • https://gipivibeg.weebly.com/uploads/1/3/4/3/134341606/popuberusir-mivefomenovija.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/1ghjh8o/reromakonazonar.pdfIn PDF document text
    • https://cdn.sqhk.co/monubinejon/b12PP74/zugazufukokasize.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xeropizuwe/47380390021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7c3fc73-2797-4ea1-8f9e-263c095a6c0a/52810164738.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/what_does_angel_number_111_mean_in_love.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/xabimaweginuzos.pdfIn PDF document text
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_5ddc752f90e14deb8f091db004c6e5f3.pdf?index=trueIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_a5f1ccb204e340bba449c63bf69d53af.pdf?index=trueIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_729acf4653d049e19ab617ed532da836.pdf?index=trueIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_b9c331f998b040e4b60fbf2ffaf855c7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8320fc33-b790-4211-b9de-dbfb46b11118/pax_s80_quick_reference_guide_restaurant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34bf9c58-32d9-4185-8111-88d4867e18a2/how_to_write_a_statement_of_faith_for_employment.pdfIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_7e40580ba7f147fba3b0b220ac8179d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/new_brahvi_songs.pdfIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_0d025e4996e643a0984883cae5e55921.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF80 5004 bytes
SHA-256: 8a83d38d405be9a8da4da61a09ccf0a029cf90d9f774279e5595ae51cf38a60a
font_01_sfnt_off0001007a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007A 18316 bytes
SHA-256: 9b51f5c92e7c304095baae2baa92b69f465b84b097c38792ecbfac4587a34082
font_02_sfnt_off00012d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D76 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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