Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7383984ae833c86…

MALICIOUS

PDF

77.8 KB Created: 2021-05-23 20:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1187990506d7d090e407f0ed49a39aa4 SHA-1: 7aa8064faabacc79fa506539c241bb37a5cb2a22 SHA-256: a7383984ae833c86b8500f27181db7c89c836b82015bd1e5df97b9de380bcf27
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=quem+foi+plat%25C3%25A3o+resumo PDF link annotation
    • https://zelivetatop.weebly.com/uploads/1/3/0/8/130814581/jakeditov-zefixi-pavavimuvoru.pdfIn PDF document text
    • https://wazexexa.weebly.com/uploads/1/3/5/3/135305699/3804981.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474475/normal_5ff6af17ca1d3.pdfIn PDF document text
    • https://favotofuti.weebly.com/uploads/1/3/1/8/131871633/bff7fd0e.pdfIn PDF document text
    • https://nipotowolexitav.weebly.com/uploads/1/3/4/6/134639117/tujekiwoj.pdfIn PDF document text
    • https://bilobunu.weebly.com/uploads/1/3/5/9/135969114/2809689.pdfIn PDF document text
    • https://sotugipuzelaj.weebly.com/uploads/1/3/0/7/130738723/d956a3a151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_6028ba5bec0e9.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/pojetoxegikove-sigopot-bilagusonekoge-rebovanalem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496165/normal_6008483848ece.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_604fe26a70053.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/518982db-7da7-4360-b903-0bf0bd399c07/48539110327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93af3619-cfe8-4c9f-a0d7-780edd218c41/87783529896.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/net_set_go_book.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/zodewurezekifujowikozor.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/isomerism_in_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/86583113673.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/jigegebavutelixev.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/30380291329.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/bootstrap_4_gallery_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/2111517048.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/jovebexujusikevuxutega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9996afe2-c60d-4192-94da-63f84686ae05/angles_in_triangles_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/turtle_beach_elite_800_transmitter_not_pairing.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

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_off0000f109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF109 5428 bytes
SHA-256: e8b1eb597e9fa40225ed2a2cd4c86f84463b27568dfc6a3bbbed893eee685e38
font_01_sfnt_off000102d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D4 12312 bytes
SHA-256: e981a4ca222f84cf0488ec5cebc65220b05783ebf23befde78e6171bf1bee2f5

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