Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd15a0dbf2821f5…

MALICIOUS

PDF

79.3 KB Created: 2021-03-30 02:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0175639be1da72330b066bc7ab407707 SHA-1: 2627c580a133e2ed784a0d2c94afbe56b76444e4 SHA-256: 9dd15a0dbf2821f5c4579c3db98a9881267272443ab7a26032e59de363d1dd05
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with a prominent one leading to 'xezojetit.ru/strik'. This URL, combined with the document's title 'How to make money on prepaid cards', strongly suggests a phishing or scam lure. The presence of ClamAV detection and ML classification further supports its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=how+to+make+money+on+prepaid+cards PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366308/normal_605ee176469af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503524/normal_5fe88db694f7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366337/normal_5fe348d2170b0.pdfIn PDF document text
    • http://iuts.space/bofajozobofuvadilax5a2bw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419198/normal_603c62346e7bd.pdfIn PDF document text
    • http://hook-up.fun/mishkin_money_banking_and_financial_markets772z3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450504/normal_603fbe60a4932.pdfIn PDF document text
    • http://reduslim-europa.site/the_lion_the_witch_and_the_wardrobe_tv_series_1967yahiy.pdfIn PDF document text
    • http://lynciguest.com/classic_dungeons_and_dragons_modules79ngr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea22d7a8-41ce-429d-b640-1c6bf092b10a/how_to_attach_hose_to_portable_air_conditioner.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/41765618425.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/5513008514.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/bosch_router_guide.pdfIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_c7d1c8ef37644d10b4de3efaa26cad6a.pdf?index=trueIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_c93c102545504dba87d61d2a3251746a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widofafane/whirlpool_wdf320pads3_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a23ce0a1-a5f9-4440-a215-9fb8effe190f/rca_rts7010b_power_cord.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/chimera_ios_12._3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc9a167d-cc90-4fb6-946a-7b93352e4905/40669408682.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/bixusosejuwemidi.pdfIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_e90e6379ce214818913d723151766fb7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/sileluxi.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/55644180460.pdfIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_4aa7928dd01b467285152c9a1052511b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvarelo/theme_of_world_energy_conservation_day_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb3f7e7d-f344-459a-b8b0-73dad37deec8/statistics_probability_tables_for_normal_distribution.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/meningitis_bacteriana_en_pediatria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afe161bc-1035-494e-9dbc-b10ec297aa0b/why_did_the_renaissance_began.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_off0000f917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF917 5408 bytes
SHA-256: 13ecee4bf4abdeb639859063ae539bc6893d0f3c94c77c53057de7cba60006a8
font_01_sfnt_off00010b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B79 10520 bytes
SHA-256: f0615d322943c1e7dfb9a109809f62350f031308f4121031b724056ebceaeafa