Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7880ae294400bc…

MALICIOUS

PDF

81.7 KB Created: 2021-03-12 13:11:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccfa346525f4e3953a8df8469adc470b SHA-1: 63831db4257675f4e1b4c3c50f660ef67f66e1b9 SHA-256: ba7880ae294400bc9f347fd309d4fd38014ae24eaebbc99712b94d870533c450
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a large number of external links, suggesting a link farm or phishing attempt. The ML classifier and ClamAV also identified it as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs, including suspicious domains like 'botokaw.ru' and 'lebedugipul.mywebcommunity.org', indicates a strong likelihood of malicious intent to redirect users to harmful content.

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-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://botokaw.ru/123?utm_term=conveyor+guide+strips
    • http://lebedugipul.mywebcommunity.org/bowajijudibikeb.pdf
    • https://cdn.sqhk.co/votexeruwiti/ihrrDhg/buzaxalitaxorosugemabada.pdf
    • http://veviwumifuvemuz.mypressonline.com/13247328341.pdf
    • https://cdn.sqhk.co/xuxovunevo/jii2gfd/limabof.pdf
    • http://blablablacar.online/1272860766524kff.pdf
    • http://0fruit.space/degowixotobujemegamazidibf3k5.pdf
    • https://cdn.sqhk.co/temegolu/ijfjjjd/dikomuwebidumogepeta.pdf
    • https://cdn.sqhk.co/viforoge/jDidjf6/renogaweb.pdf
    • https://cdn.sqhk.co/fojevimexu/hfwhb8H/26112105308.pdf
    • https://cdn.sqhk.co/fipimomozuk/jhWjcia/germs_virus_smash_ultimate.pdf
    • http://roman-holidays.shop/what_is_the_difference_between_christianity_and_greek_orthodoxbem1x.pdf
    • http://endi-itali.space/217008682493zu6b.pdf
    • https://cdn.sqhk.co/redusebi/gehdXNb/81878305019.pdf
    • https://cdn.sqhk.co/xurazegoba/xghunkV/winter_hiking_boots_vs_mountaineering_boots.pdf
    • http://gosugas.getenjoyment.net/depolulixewixoku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_6e77b661811248b2b7a1d9d7a7a360a1.pdf?index=true
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_b93da23a7f4743afb1e54f137608696c.pdf?index=true
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_745a6f640d324ddebe50b8f413cdf065.pdf?index=true
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_d98a4e9afb404b148d76fe52a489f04b.pdf?index=true
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_67a2773b7c044837bb477e3e646813d0.pdf?index=true
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_5ae67a66b9e54a9698e495f8027253a3.pdf?index=true
    • https://a39ac558-8fe8-437d-9e10-dc9402d6cb9c.filesusr.com/ugd/1ebe14_eb1dff04b8e44c899074270d3acc9c4c.pdf?index=true
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_491c7616db3c4fc085b5bda432cb737f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee7e.bin
7a66cdee20b64418818c6242c755a102dcb2040f1d8999675a2c59fc3130e12d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7E 4952 bytes
font_01_sfnt_off0000ff79.bin
1185d6ac8a29743b3ad902e0d5f8ea30bc34afe447cb03862cf1b5f0a886376d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF79 10796 bytes
font_02_sfnt_off00012440.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12440 16164 bytes

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