Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2165aceaa3559e…

MALICIOUS

PDF

80.9 KB Created: 2021-04-08 05:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f6df2694cb1dc703fb789f94dc766670 SHA-1: 52f56cca51681a1b7c473fa4590e21d28503a3ab SHA-256: fb2165aceaa3559e893267dbd68179f6ef93a0976723e05751b2093c75761dd4
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 0.9995

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://ponafet.ru/wix?keyword=alien+juice+bar+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463306/normal_5fd893ce0d2e2.pdfIn PDF document text
    • http://fesavuxofogegil.iblogger.org/mivivepewobuz.pdfIn PDF document text
    • http://gaxakemokesibit.22web.org/40444597568.pdfIn PDF document text
    • http://xugejujivekivu.iblogger.org/what_are_the_7_steps_in_conflict_resolution.pdfIn PDF document text
    • https://nojilino.weebly.com/uploads/1/3/1/4/131407263/1655672.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378855/normal_60074759d546b.pdfIn PDF document text
    • https://remurefovedelag.weebly.com/uploads/1/3/1/8/131860204/zevufuvidumewanudi.pdfIn PDF document text
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/jufalinopigu.pdfIn PDF document text
    • https://zefojakafi.weebly.com/uploads/1/3/0/7/130776787/463a7c0be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388405/normal_605266c0bc388.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/jiwisi/61021627844.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/wanegaset.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/tewatugekabaga.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/idle_poring_stats_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/vonipapojupuwutinav.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/waiting_for_the_barbarians_novel.pdfIn PDF document text
    • http://gukupexokopiwug.epizy.com/pazoro.pdfIn PDF document text
    • http://gadojir.rf.gd/sociologia_john_macionis.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/english_grammar_short_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/77456595133.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/auto_accident_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/16654946710.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 5604 bytes
SHA-256: 8e105141d0c6bcdb52f5da639d75f9ad5dce81e343e0b8b9b270de3b6d968fdf
font_01_sfnt_off0000f964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF964 10852 bytes
SHA-256: e0ae9ab9c2f059ec08c32b5fe15acea6a1b1e1e8c9b3a2da6df1eb160e858f39
font_02_sfnt_off00011ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA1 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf

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