Malicious PDF — malware analysis report

Static analysis result for SHA-256 f75db89208ebf48a…

MALICIOUS

PDF

74.0 KB Created: 2021-03-09 08:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30cb6e0b20b810b847b577ec5b961be9 SHA-1: 564b1f43cbed9e6005fe8bd4e3280181a865629a SHA-256: f75db89208ebf48a47bff3c2e858c0e7d3662905c600802f96cdceda8fa67184
156 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a large number of external links and a ClamAV detection for a phishing trojan. The embedded URL points to a suspicious domain, likely serving as a lure for users to click through to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=mysteries+of+the+rosary+for+kids
    • https://gapidegit.weebly.com/uploads/1/3/1/3/131379699/wujonorinudavokozawo.pdf
    • https://vonorakukipi.weebly.com/uploads/1/3/4/7/134721252/7747054.pdf
    • https://cdn-cms.f-static.net/uploads/4403415/normal_6035778bbb77b.pdf
    • http://lavijowonuxogu.22web.org/43695827930.pdf
    • http://nozozofodedeza.iblogger.org/snack_bar_hickory_nc_menu.pdf
    • http://sorifaj.22web.org/takilejavumev.pdf
    • https://lipixifafamuxa.weebly.com/uploads/1/3/0/9/130969384/zakubu.pdf
    • https://cdn-cms.f-static.net/uploads/4497078/normal_602b498c6de01.pdf
    • https://cdn-cms.f-static.net/uploads/4490274/normal_5fd1bcbb13acd.pdf
    • https://watinadapazibe.weebly.com/uploads/1/3/4/4/134492378/80a9f646aafc5f.pdf
    • https://cdn-cms.f-static.net/uploads/4379473/normal_6012faef323a6.pdf
    • https://cdn-cms.f-static.net/uploads/4447108/normal_5fd9e4a3e718d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nigimul/defense_form_deoxys_raid_guide.pdf
    • http://kusilip.epizy.com/67575608057.pdf
    • http://texepeduluge.epizy.com/skyrim_undeath_lich_appearance_guide.pdf
    • http://fazetotunoju.epizy.com/743294117.pdf
    • https://s3.amazonaws.com/vuterijoze/44810683402.pdf
    • https://s3.amazonaws.com/fosagoba/bacterial_transformation_animation_mcgraw_hill.pdf
    • https://s3.amazonaws.com/norozovijalu/netegalilipasepudamabebog.pdf
    • https://s3.amazonaws.com/fapaga/what_is_isekai_manga.pdf
    • http://muxajetolalet.epizy.com/joomla_template_builder_free.pdf
    • https://s3.amazonaws.com/zoluwivebiro/87092982742.pdf
    • https://s3.amazonaws.com/xunilukegez/46318548576.pdf
    • http://mijekobafenado.rf.gd/xusuwikalega.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6c7.bin
e7fe9348dcfbe9b160aa1ddd1a564758b56d43fdc57c28a6d7a8a64e25f6f729		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C7 5136 bytes
font_01_sfnt_off0000f84c.bin
e1a87224f6fae8a9e144ab7ddfeb402734a13bf380ebe3bfdd0655eb71c2da3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF84C 10044 bytes

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