Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29ceb21a73e97b6…

MALICIOUS

PDF

78.9 KB Created: 2021-03-27 18:05:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c8bb72014ef5e1aa7d789d5ad3c2f2a SHA-1: 41519f3199c612973849e4c167d4ea75bc828dfc SHA-256: d29ceb21a73e97b64c2f767575de757bb8b9c3571c1fa407be35d6d855f54c96
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a PDF link farm and a ClamAV detection for phishing. The embedded URLs suggest an attempt to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm indicate a likely phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/wix?keyword=manual+transmission+toyota+tundra
    • https://foxesusonixuna.weebly.com/uploads/1/3/5/2/135298742/zifumufa_pepuberodagufol_pifijuzel_ziwazaxomuxoso.pdf
    • https://cdn-cms.f-static.net/uploads/4465250/normal_60329fae1d4d9.pdf
    • https://semitedajun.weebly.com/uploads/1/3/1/6/131636975/1210301.pdf
    • https://vowexigap.weebly.com/uploads/1/3/1/6/131636774/3252076.pdf
    • https://cdn.sqhk.co/woxekivepi/heiejat/resident_evil_8_ps4_release_date.pdf
    • https://cdn-cms.f-static.net/uploads/4454544/normal_6031e2d2204fa.pdf
    • https://fumumakol.weebly.com/uploads/1/3/4/0/134017799/kefedugosujup.pdf
    • https://nirilixurem.weebly.com/uploads/1/3/4/4/134474770/885dbfb3ffa960.pdf
    • https://cdn-cms.f-static.net/uploads/4447278/normal_60360ae65a572.pdf
    • https://zuveravovizopow.weebly.com/uploads/1/3/0/9/130969477/7524908.pdf
    • https://static.s123-cdn-static.com/uploads/4475219/normal_5ff4919724c9e.pdf
    • https://wozomeki.weebly.com/uploads/1/3/0/7/130776066/1140211.pdf
    • https://cdn.sqhk.co/tebefaravuz/jRhbhju/inception_music_sheet.pdf
    • https://cdn-cms.f-static.net/uploads/4408324/normal_601b53e25db9d.pdf
    • https://cdn-cms.f-static.net/uploads/4470821/normal_604d63dde320a.pdf
    • https://cdn-cms.f-static.net/uploads/4408481/normal_60314d7f482c2.pdf
    • https://static.s123-cdn-static.com/uploads/4384642/normal_5fecd0fec882a.pdf
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/fogodoromabajem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rurovikejigibu/ignou_tentative_date_sheet_june_2018.pdf
    • https://s3.amazonaws.com/jozaponi/zulerezugezonexazu.pdf
    • https://s3.amazonaws.com/muvojugejoxip/the_crown_season_1_episode_2_cast.pdf
    • https://s3.amazonaws.com/xazarujokemus/23659309235.pdf
    • https://s3.amazonaws.com/fazujo/86924518617.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_off0000f773.bin
02e6d48d01d8e9a45bc9dc38dc0f08081b418d7cc90e48c5946f742e826c2919		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF773 5076 bytes
font_01_sfnt_off000108b1.bin
3a8f5f3be39af1025df6ef8326b10572cc3b636b975b54069b35f4db7b216d05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108B1 10864 bytes

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