Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0bd97c4f051a49…

MALICIOUS

PDF

74.0 KB Created: 2021-03-14 17:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4720c5fb8cd3e485127df205eba6d683 SHA-1: c57ee70f0d8c85d7a9d436bf4db3c148b1f4e8b5 SHA-256: 0c0bd97c4f051a4903fea3318cfbde3ed174594ae9dd43633f3d7b58cdc7cd7c
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are flagged as part of a link farm. The ClamAV detection and ML classifier indicate malicious intent, specifically identified as phishing and trojan activity. The presence of external URIs suggests an attempt to redirect the user to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7941

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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=goldline+controls+aqua+plus+manual
    • https://cdn-cms.f-static.net/uploads/4380869/normal_60451647542f3.pdf
    • http://napowojeba.medianewsonline.com/jefovalimizapaxubikokami.pdf
    • http://securityverifiedservices.com/how_to_put_my_delta_crib_together67cma.pdf
    • http://instapodarok.site/832171553793fx7n.pdf
    • https://cdn-cms.f-static.net/uploads/4501356/normal_600fb11a3302a.pdf
    • https://cdn.sqhk.co/kinerufi/cifiche/bazewulerogefagoda.pdf
    • http://triple-doska3.club/zokomumugapuwewimemamurixo3c8k.pdf
    • https://static.s123-cdn-static.com/uploads/4388406/normal_5fe5b8259c189.pdf
    • https://cdn.sqhk.co/sifajoxojif/hvPpqhj/gudolivisimek.pdf
    • https://cdn.sqhk.co/xagaxubibiz/heKe7ig/potozinamatapanavobarorim.pdf
    • http://zedateve.mypressonline.com/18160054161.pdf
    • https://cdn.sqhk.co/tudobele/7jchjgi/11753293386.pdf
    • http://opencabinets.xyz/wikumebesitiup7zt.pdf
    • http://jikusofare.mywebcommunity.org/19562039896.pdf
    • https://cdn-cms.f-static.net/uploads/4462362/normal_60466c1948466.pdf
    • http://wbigs.space/corel_portable_bagas31i17zn.pdf
    • http://vivekawiga.sportsontheweb.net/file_khng_copy_c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_0a3ef9b664b941f5950a916ac6517514.pdf?index=true
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_3dd5d15b106a43ddb1a066d994980a2d.pdf?index=true
    • https://s3.amazonaws.com/tokit/wesezomezeg.pdf
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_279edf8fd4744648914887847edb8de2.pdf?index=true
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_534e44891e494270b1385224196ea9d3.pdf?index=true
    • https://s3.amazonaws.com/genukopapovixo/komalosapediga.pdf
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_331185f4056d4f4f912d9d218156324d.pdf?index=true
    • https://s3.amazonaws.com/rexogeguxosix/newwave_vincennes_indiana_tv_guide.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f59e.bin
0121f42d04287d913f6587b9623c986cb01d7769353c6a749338ca9186ba4dab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 5376 bytes

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