Malicious PDF — malware analysis report

Static analysis result for SHA-256 250f79d1f0625f69…

MALICIOUS

PDF

103.6 KB Created: 2021-04-01 00:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fad67a388c2275bd2284c5923b09f2fb SHA-1: d30f566151bb7ccc2c5a3746fbdd67217f0ae247 SHA-256: 250f79d1f0625f691a6e92cf5837cee9b58fb84c109d93429815920b2f32da5d
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 0.9993

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://ponafet.ru/award?keyword=lightning+protection+pdf PDF link annotation
    • https://popupobapovuzus.weebly.com/uploads/1/3/4/0/134012290/f3f7ffc.pdfIn PDF document text
    • https://gufekibeliwu.weebly.com/uploads/1/3/1/3/131382841/3373653.pdfIn PDF document text
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/vovapebitufetoma.pdfIn PDF document text
    • https://kabuxezalexafa.weebly.com/uploads/1/3/0/8/130814122/9927905.pdfIn PDF document text
    • http://kewokuxumuzig.medianewsonline.com/27546814221.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/kujapomib/18_korean_drama_series.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/wetulodinixoziterirasub.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/free_motion_for_continuance_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c571f09c-aaac-453b-8242-a4caf7b69dcf/runovizolexasu.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/42609395771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac1ce45-decc-430e-aa88-c4c1ce16a77a/division_of_fractions_worksheets_common_core.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6d1d2f7-f5f0-4508-b7a7-12fa76f69c54/how_to_give_furniture_a_whitewashed_look.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ea4824-47c1-46b6-892a-44e2c2d8a642/tp_link_1200_powerline_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/po_box_usps_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/44362759422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b76cf779-2068-46da-94c5-7868de67a775/how_strong_is_astas_grimoire.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/what_is_the_main_idea_of_the_book_enemy_pie.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/zakojufakozepizomekuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7717ca0d-e665-4f28-bd4c-115b73376dd7/47125379054.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/79959592700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ecc995-fe30-4522-9065-d11fc975daff/negafigi.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/dogegifezi.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/rexab.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001556b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1556B 4936 bytes
SHA-256: 172e80b96cb8bfe9dfdd7302e227f0ac90d92166919ba8306d0374793182a9a3
font_01_sfnt_off0001663e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1663E 13648 bytes
SHA-256: b400562e7e37ea5a6d9157a34af7b44eb1c43a8aff2e512662e592780e4602fb

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