Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2cad410d971cb3c…

MALICIOUS

PDF

82.8 KB Created: 2021-03-21 20:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 458e82e13cbdfa65a50b46b462aec310 SHA-1: ab2bf8354ae69102b8d698e3ca4439fa876e0535 SHA-256: d2cad410d971cb3c43d853b6bfb015e1e9535d5472ae45451980388d3000fba8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains a significant number of external links, indicative of a link farm designed to direct users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to exploit users by redirecting them to potentially harmful content, possibly leveraging embedded JavaScript or other PDF exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/123?utm_term=lyran+malm%25C3%25B6+white+guide
    • https://firizuvamo.weebly.com/uploads/1/3/4/6/134618899/kamibixoz.pdf
    • https://cdn.sqhk.co/furafurume/XWPogcV/dojifapatuw.pdf
    • https://cdn.sqhk.co/jigugabopu/gcmjdia/telecharger_sing_karaoke_by_smule_pour_pc.pdf
    • http://whitecheat.xyz/darksiders_ashlands_walkthroughjzf60.pdf
    • https://cdn.sqhk.co/wekababu/ezGY1Ls/offline_popular_song.pdf
    • http://unreguezff.rest/10296701292dsczc.pdf
    • http://goods-amzon.com/4518596780y4m7v.pdf
    • https://cdn.sqhk.co/kajipazuto/hefRHPh/marco_s_pizza_menu_coupons.pdf
    • http://gonakasuzoze.22web.org/83484679730.pdf
    • https://wakutoji.weebly.com/uploads/1/3/4/3/134314583/8186501.pdf
    • http://xenotobewaf.22web.org/rorumikedikuretopeji.pdf
    • https://cdn.sqhk.co/kimorotadopo/4ignVgg/gidepewawomivi.pdf
    • http://geleostone.online/42430584175bvscj.pdf
    • https://cdn.sqhk.co/goloravevi/cjj2qia/zuketigapevexaf.pdf
    • https://cdn.sqhk.co/nukuzulu/GIiamNj/branson_shows_september_2020.pdf
    • https://cdn.sqhk.co/pufojoloz/vzjiusR/50629037723.pdf
    • https://cdn.sqhk.co/fikalibumi/XCwia3k/canoscan_lide_100_driver_free.pdf
    • https://ximipozatapemo.weebly.com/uploads/1/3/5/2/135297631/pivagovovemevov_dexawolodel.pdf
    • http://dkblogin-de.best/how_many_male_greek_gods_are_therer9aoz.pdf
    • https://gijejutet.weebly.com/uploads/1/3/5/9/135974865/bofezileve-gomefoz.pdf
    • https://cdn.sqhk.co/minamojazi/4oie5hb/28358977407.pdf
    • http://topdiscount.pro/703204849000008g.pdf
    • http://marketeuro.pro/mozatobolauz6nu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://teveniwavabubak.rf.gd/tiroregap.pdf
    • http://mudoxaw.epizy.com/emulator_gba_pc_free.pdf
    • http://magivaxinel.rf.gd/25483079698.pdf
    • 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_off0000f8ca.bin
198f9e851b57886a6c80fb507c0cc609564c560c94e91ce0794b935b50f1b989		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CA 5336 bytes
font_01_sfnt_off00010a9e.bin
febe64c37b8d108d08be321318b206d59f4de8b4cf41a794c562217531e97603		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9E 16040 bytes

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