Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe44205cb31fcf6a…

MALICIOUS

PDF

88.4 KB Created: 2021-03-17 23:00:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d60dc8275329840a1bfbc7389cfcf580 SHA-1: 5b4b93d27ed71038b8475b943dd1a33f77ee570b SHA-256: fe44205cb31fcf6af15b9e38ce7e6b692cd375c4cc5c61289f3a6d1989773e18
164 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. It uses an urgency-based lure. 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 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nipisod.ru/wix?keyword=welcome+to+the+world+of+tomorrow+futurama+gif PDF link annotation
    • https://cdn.sqhk.co/jenireni/QiiBmjf/bodogujakovumiwet.pdfIn PDF document text
    • http://academic-club.ru/yo_te_amo_in_english8726x.pdfIn PDF document text
    • https://cdn.sqhk.co/fipufose/gimQhhJ/word_blitz_messenger_hack.pdfIn PDF document text
    • http://hookup673.site/what_is_the_long_i_sound0hbbo.pdfIn PDF document text
    • http://ideal-it.fun/9678012230b0nvq.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/RN9HgcN/23074490172.pdfIn PDF document text
    • https://cdn.sqhk.co/voxoduvi/bEzg395/136246363.pdfIn PDF document text
    • http://wow50.pro/77664562646xx05o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_bf4a1e57249c46f183e807230e079005.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/how_to_install_a_bontrager_trip_100_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/how_to_increase_height_in_1_month.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/packaging_box_design_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/sql_enterprise_licensing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/types_of_sentences_worksheets_simple_compound_complex.pdfIn PDF document text
    • https://b9387e75-0942-48a6-8a47-0bd3f0224277.filesusr.com/ugd/fc485c_cb7b3e9e1cdd4eb493ae1ee6a39349d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/farmville_tropic_escape_guide_book.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/67550488693.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/java_swing_components.pdfIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_e1b9b3d2ba294f53b81df83edce481a5.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11773 5364 bytes
SHA-256: 99834580f01c82968484559f7707f3a245ba801d05672b31378f8864b4ed58fe
font_01_sfnt_off0001299e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299E 11960 bytes
SHA-256: 8bcb10ccc415e0fcf28b372a3f1a0894aca00a82e24e6db6dd1e2c9645d6e383

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