Malicious PDF — malware analysis report

Static analysis result for SHA-256 873431516393dbba…

MALICIOUS

PDF

77.5 KB Created: 2021-03-31 07:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3e7a60dd302f24ba0997dff7de3def69 SHA-1: 710c3d6433d943ee52e646c1444773ab4dbf05b5 SHA-256: 873431516393dbba8ede66b371f72fec41e305a2880fb165380b564d775c5615
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 0.9997

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/123?utm_term=oral+cancer+definition+pdf PDF link annotation
    • https://jarajegixam.weebly.com/uploads/1/3/1/4/131437089/semetiwitabobub_vilupose_fobukebev.pdfIn PDF document text
    • http://kernig.store/tubutenenatiladalekolor0nm4j.pdfIn PDF document text
    • http://robot3.site/how_much_does_service_manager_makezrlje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492915/normal_60321e969f75e.pdfIn PDF document text
    • https://melinifijegor.weebly.com/uploads/1/3/4/2/134265386/texerel_xosopuratokib_suremipibas.pdfIn PDF document text
    • http://hookup153.site/92258095140p5mqw.pdfIn PDF document text
    • https://buporinedo.weebly.com/uploads/1/3/4/0/134041533/1559322.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/a7iejhb/41738200832.pdfIn PDF document text
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/fojideregikimi-resuvuraniboru-dexokalaxud-xibimafu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465125/normal_5fc5f7bc4d3df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476939/normal_5fed9e078be05.pdfIn PDF document text
    • https://cdn.sqhk.co/wanowofimaz/etnlhai/nickname_generator_free_fonts_name_creator_symbol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369505/normal_6039f2d79f035.pdfIn PDF document text
    • http://prosale.company/magic_castle_centerville_ohqp3h2.pdfIn PDF document text
    • http://1xbets-reg.site/folikanidaljp4n.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/sudevejerifu/echo_cs_490_bar_size.pdfIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_94d06124cd7146e9937171a369b438d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gopifu/osfi_icaap_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/gomilasatikekugama.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/49051480402.pdfIn PDF document text
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_8c69787c59bb42c4b739f2942a70bbb1.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

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_off0000f4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C1 4996 bytes
SHA-256: 4db72af46a3c263f927484518f03bedabf49d5ae5390bc6a552f0586efe389db
font_01_sfnt_off000105cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CF 10340 bytes
SHA-256: e2d24b9e8114f6315993cd878d58b701eb3466cc5ea5e5d4cde9a3eb45b43048

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