Malicious PDF — malware analysis report

Static analysis result for SHA-256 155e5e7c2a682765…

MALICIOUS

PDF

71.9 KB Created: 2021-04-03 17:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cc77968c88cbec97f9fefaf9d05c83e9 SHA-1: a953dc6905f59129c1639360b11814d5e29f0168 SHA-256: 155e5e7c2a682765feb74ecac3d55405eedbe03db71d4498ecaddad53f38ced7
156 Risk Score

Malware Insights

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

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 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://seumenha.ru/wix?keyword=middle+georgia+resa+substitute+teacher+training PDF link annotation
    • https://xutogimumunode.weebly.com/uploads/1/3/4/3/134375265/8417266.pdfIn PDF document text
    • https://dekupepevimozis.weebly.com/uploads/1/3/0/7/130738652/c7aae93.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/3d72a.pdfIn PDF document text
    • https://dumugukof.weebly.com/uploads/1/3/4/6/134647937/wezefig.pdfIn PDF document text
    • https://lidawutoroliv.weebly.com/uploads/1/3/1/8/131872032/6110040f291937.pdfIn PDF document text
    • https://joweralifaj.weebly.com/uploads/1/3/4/3/134350132/vokazubegobalekukar.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/jovekus/what_is_the_admin_password_for_verizon_fios_router.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/55445356456.pdfIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_d8e21e68c7744a30acc7f1e880c5527c.pdf?index=trueIn PDF document text
    • https://7c8f45b7-e058-4e27-bccd-8ee7dcb26900.filesusr.com/ugd/d5cf39_a19e6a3acaa5420b9d4ac1c10e7d735f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/starfrit_can_opener_manual.pdfIn PDF document text
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_f25a23149b5341aaa2a49a4163f1ee48.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/cloudformation_get_subnet_availability_zone.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/13814468552.pdfIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_668872165e714fe8a7636d238628daa5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jebokizez/sujugodonexuj.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/sipoxataperukosogolix.pdfIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_5e0ec4bf91954fe78991a9b4b84b2452.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tenunud/bogifasof.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/94642074756.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_off0000dae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE4 5344 bytes
SHA-256: d2007fb9b6fc6f2321f267310a30600dd94b4f8b6944a66ca31aab304f8ff1f6
font_01_sfnt_off0000ed11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED11 10804 bytes
SHA-256: d77db0f0a81d8b561428709fcaae2dd56f32f6c32db41f2477007323b0745f8d

Open this report in the interactive analyzer, or submit your own file for analysis.