Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d047c7b89e0048…

MALICIOUS

PDF

64.5 KB Created: 2021-03-25 01:33:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64e0d063db0f12aaa2f0a6fe9e290024 SHA-1: d6a001419570d1309627a12df49c2b529a33580a SHA-256: 01d047c7b89e00487f96386792f48691872a1af0e1f7a29e4730bea0f2393ec6
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=panama+canal+worksheets+activities
    • https://zamikife.weebly.com/uploads/1/3/1/6/131606416/desesesabube.pdf
    • https://sexaximelukifa.weebly.com/uploads/1/3/1/0/131069869/20947.pdf
    • http://majikok.mygamesonline.org/resumen_de_la_biblia_por_capitulos.pdf
    • https://puzaloraren.weebly.com/uploads/1/3/4/5/134510283/1ef8db3b4898f7.pdf
    • https://bazewubudib.weebly.com/uploads/1/3/4/7/134731154/xumafoviwiralobomu.pdf
    • https://cdn.sqhk.co/pikukafil/gichffh/sowadobe.pdf
    • http://sifimomikev.sportsontheweb.net/medicinal_plants_in_kerala_malayalam.pdf
    • http://sutarakikim.scienceontheweb.net/tepojosiserini.pdf
    • https://cdn.sqhk.co/xawodoze/gg4pgcb/fimasoralomomowamug.pdf
    • https://lixebofupasiwik.weebly.com/uploads/1/3/2/3/132303312/gapatasemafe.pdf
    • https://cdn.sqhk.co/kivipemo/Coljfza/20686375296.pdf
    • https://bumiwawewa.weebly.com/uploads/1/3/5/3/135343946/sakajedevela_gubazopusir_fefoluripi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bovenotojitowe/46035836076.pdf
    • https://s3.amazonaws.com/fosawef/hp_1536dnf_error_79.pdf
    • https://s3.amazonaws.com/zopenave/playstation_3_remote_control_not_working.pdf
    • https://s3.amazonaws.com/belopudevuzuza/ronexatalajovuwewobo.pdf
    • https://s3.amazonaws.com/tanapilamaxi/zanurudomeseletuguzekoxo.pdf
    • https://s3.amazonaws.com/najubu/udit_narayan_song_likewap.pdf
    • http://fuvarijes.atwebpages.com/tosuxeponug.pdf
    • https://s3.amazonaws.com/sinamozagemoger/subetamewitoloroxojimovix.pdf
    • https://s3.amazonaws.com/zedilegol/givipemageweniwivukin.pdf
    • https://s3.amazonaws.com/voxazedisula/jumulanugowe.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_off0000c1b4.bin
2436409702017ac3a808e38b2b35101bafbd9a64531f5da1bab6e72789c5396a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B4 5256 bytes
font_01_sfnt_off0000d37d.bin
e736f09b3a3ada5bfffd2cbd89861f14b9086ac1b16fda392a52afd1c1a4c0a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD37D 9728 bytes

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