Malicious PDF — malware analysis report

Static analysis result for SHA-256 c177bf1eec10d7f3…

MALICIOUS

PDF

89.7 KB Created: 2021-03-21 21:38:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a2f5173333063b375d6e01ac4dbd4d5 SHA-1: ea00f3b0098da6c433a3bc7873c0ef8e9bad5b03 SHA-256: c177bf1eec10d7f3a9edb1bf6889be26a9244abe14b4f75e3290b27305524312
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it's part of a link farm designed to drive traffic. The embedded URL `https://lozipotod.ru/wix?keyword=spongebob+moves+in+download+apkpure` suggests a lure to a malicious site, likely for phishing or malware distribution. ClamAV also detected it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://lozipotod.ru/wix?keyword=spongebob+moves+in+download+apkpure
    • https://static.s123-cdn-static.com/uploads/4485703/normal_5fd0741eba8fa.pdf
    • https://cdn-cms.f-static.net/uploads/4405414/normal_5fe909e8cded5.pdf
    • https://static.s123-cdn-static.com/uploads/4376369/normal_5fef346bb5726.pdf
    • https://cdn-cms.f-static.net/uploads/4388280/normal_60222334ec056.pdf
    • https://cdn-cms.f-static.net/uploads/4459062/normal_6037ed813cd0c.pdf
    • https://cdn-cms.f-static.net/uploads/4404497/normal_600f1e6f61ffc.pdf
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5fd1b321c4858.pdf
    • https://static.s123-cdn-static.com/uploads/4497688/normal_600635b464357.pdf
    • https://cdn.sqhk.co/rasepotobami/jeictfL/commander_s_intent_statement_example.pdf
    • https://cdn.sqhk.co/mivivezar/gdvxjha/vopamalurifijanoxet.pdf
    • https://cdn.sqhk.co/niserutom/gihahjU/best_craft_beers_2019_uk.pdf
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/5200419.pdf
    • https://linonojito.weebly.com/uploads/1/3/1/3/131380720/vitogufuxuweger.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rerinago/87105328081.pdf
    • https://s3.amazonaws.com/turip/beach_sand_vector_free.pdf
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_633ced9c7cd045b799ee0c87459fce23.pdf?index=true
    • https://s3.amazonaws.com/mubemutolewe/casio_fx-_991ex_classwiz_manual.pdf
    • https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_c8538c33330b4ec8a69e57d7e3547907.pdf?index=true
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_bb43accae422476c8336f9d38dbba925.pdf?index=true
    • https://s3.amazonaws.com/xefezesebusu/what_is_rational_belief.pdf
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_b4c19850b15d4741b930a33ed19c93a7.pdf?index=true
    • https://s3.amazonaws.com/pasawe/active_directory_cross_forest_migration_guide.pdf
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_f7acf3540bfc413786f8ba48f4e73f7b.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb33.bin
4bf21395b9b224fbdafc37625dc42983f8c7ea383b569beac3e18d30dfb6c4fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB33 3084 bytes
font_01_sfnt_off0001062a.bin
3ecccf9ce843768ddc89439be0a994f3ac88e0fe3dede6c02df8dea15d24b928		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1062A 5740 bytes
font_02_sfnt_off000119aa.bin
4131c74a4f09d464ba3e79a8b464e096a72c8ba8fbe426c3ac78d8e802daf32d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119AA 12948 bytes
font_03_sfnt_off00014333.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14333 16204 bytes

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