Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c5244fdeb6349a5…

MALICIOUS

PDF

96.6 KB Created: 2021-05-24 01:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d47c6267f5753c44c73dc1f6fbdcd09f SHA-1: ae53a70ae1221f1a6e553d61de6b4d13829fa989 SHA-256: 1c5244fdeb6349a54ce651840492a02dbdfd3e07f3039f167accd18a97916ace
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 0.9996

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://lozipotod.ru/strik?utm_term=what+is+the+4+digit+code+for+onn+tv PDF link annotation
    • https://zotagozugub.weebly.com/uploads/1/3/0/7/130739891/gatabobakubo.pdfIn PDF document text
    • https://daradila.weebly.com/uploads/1/3/1/4/131438164/jiwukopodedibe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_605143091a46e.pdfIn PDF document text
    • https://vokesilito.weebly.com/uploads/1/3/4/4/134400786/9feba0cabe2b9.pdfIn PDF document text
    • https://xowetigebunagu.weebly.com/uploads/1/3/1/6/131637365/1274892.pdfIn PDF document text
    • https://voxonexagigiwal.weebly.com/uploads/1/3/5/3/135346225/114055.pdfIn PDF document text
    • https://zotorakiv.weebly.com/uploads/1/3/0/7/130739478/3221808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451206/normal_5fd9ab8c52962.pdfIn PDF document text
    • https://tezifotunojoke.weebly.com/uploads/1/3/0/7/130776805/6260743df1.pdfIn PDF document text
    • https://jobalexaxikut.weebly.com/uploads/1/3/4/8/134892204/b09dbb0f.pdfIn PDF document text
    • https://nupewaxupojiga.weebly.com/uploads/1/3/4/0/134042887/8d4a3.pdfIn PDF document text
    • https://virenogapugutu.weebly.com/uploads/1/3/4/6/134635416/bukure.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/kagedatabujo/itunes_match_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/56333642876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/161db98d-5362-467f-8a31-3f8bf36464d0/what_is_the_first_book_in_the_selection_series.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/how_to_send_certified_mail_with_return_receipt_usps.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/aws_cli_folder_from_bucket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6630f655-9f93-4e38-b590-82e2450e5eb6/lujewuxazexamita.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/fokinaxafuwapojikixojaje.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/64242969459.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/derememedo.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/vikufir.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_off000138da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138DA 5412 bytes
SHA-256: d655dfe9cbfdfa10ec0e261f9389b8e7dc84df29f064fcfe2da6edd0dc8e3ae1
font_01_sfnt_off00014b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B59 12596 bytes
SHA-256: cbd77bf8392fc327be03ff02f3b5cf850941121248191ed5ee4ca4595d13c208

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