Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5ff451298947ce…

MALICIOUS

PDF

90.9 KB Created: 2021-03-19 16:57:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2421b5cf7b784074427c5e87972638ee SHA-1: dadb72a24a7c160d6a54bc49d656deb501eb4354 SHA-256: be5ff451298947ced5354cd2673fee9c9f7b52d4052338e36d9960b31df1da47
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to potentially harmful external websites, as evidenced by the numerous URLs extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/123?utm_term=cinderella+dress+transformation+broadway
    • https://xulozajewe.weebly.com/uploads/1/3/1/3/131384688/2825694.pdf
    • https://bemozepe.weebly.com/uploads/1/3/0/7/130739793/lofemifam_gamilad_sukam_wuxiworuxa.pdf
    • https://cdn.sqhk.co/lorotukogof/ZjeRgdd/chop_chop_fruit_perfect_slices_game.pdf
    • https://cdn-cms.f-static.net/uploads/4404512/normal_603e27d933e8d.pdf
    • https://gesunewa.weebly.com/uploads/1/3/1/4/131438127/6352612.pdf
    • https://cdn.sqhk.co/zafupusapun/YcC4gcT/extreme_drag_racing.pdf
    • http://miguxinam.22web.org/the_old_man_and_the_sea_google_drive.pdf
    • https://cdn.sqhk.co/raserijene/inLG8qj/den_haag_fm_radio.pdf
    • https://xapewagese.weebly.com/uploads/1/3/4/3/134314981/kusukuk.pdf
    • https://static.s123-cdn-static.com/uploads/4393353/normal_5ff01ec7ce133.pdf
    • http://widesez.iblogger.org/20718620411.pdf
    • https://cdn-cms.f-static.net/uploads/4421040/normal_5fd164228be75.pdf
    • https://static.s123-cdn-static.com/uploads/4454289/normal_60055966e8bc7.pdf
    • https://cdn.sqhk.co/kifateten/igjiWgi/nonunogadolaburegiraboz.pdf
    • https://zutomivopisi.weebly.com/uploads/1/3/6/0/136051870/gujefafunudavef.pdf
    • https://static.s123-cdn-static.com/uploads/4493201/normal_6003493d93e1b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nadadeze.epizy.com/dupokaparogidezim.pdf
    • https://0f7a2101-273c-4f7f-b1fd-079d1ad923c1.filesusr.com/ugd/a7ea6f_8d0a74a28c304ec09f8858be5dc7acbc.pdf?index=true
    • http://getapumofibejop.epizy.com/faringoamigdalitis_bacteriana_nios.pdf
    • https://uploads.strikinglycdn.com/files/7b9415da-ac35-4ca9-9097-f8e00026d517/14672282405.pdf
    • https://uploads.strikinglycdn.com/files/7bdbc8b9-777a-49a5-9b8d-07dc945215a8/87207585737.pdf
    • https://uploads.strikinglycdn.com/files/4266884b-4ff5-44e6-8454-fa4ddb2b817e/bapegivix.pdf
    • https://uploads.strikinglycdn.com/files/8263c4cb-ee17-4626-addc-3911e510ecc1/6237478298.pdf
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_37741037d27049b2a616d8aabe0d9f13.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012619.bin
a100127d41172cef48da020deca891033f796081bf96131b7c2d54bf6a3dfa0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12619 5292 bytes
font_01_sfnt_off0001380f.bin
c48fe7295ae777c404e3e4ecc00d9504b0f2fd3ac38108352df1ddb7b1d02dd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1380F 11184 bytes

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