Malicious PDF — malware analysis report

Static analysis result for SHA-256 282f5d3886ee50a7…

MALICIOUS

PDF

95.5 KB Created: 2021-03-20 23:36:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77113f8ecec80c1036d1cd88ed464463 SHA-1: 59d49a4d58e1e953724275e58b8e4ae41c8caf03 SHA-256: 282f5d3886ee50a782a2b3848489690b29d357e7518c602ded2cd1495d77d0d0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings reveal it contains a large number of external links, suggesting it's part of a link farm or phishing campaign. The primary malicious URL identified is https://botokaw.ru/award?keyword=statut+auto+entrepreneur+2020+pdf, which is likely used to redirect users to a malicious site. No scripts were extracted, but the presence of numerous external links points towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/award?keyword=statut+auto+entrepreneur+2020+pdf
    • https://lodobimamavudug.weebly.com/uploads/1/3/4/3/134306091/fubebela_julawewerewabag_pikiwubopuma.pdf
    • https://fakipaga.weebly.com/uploads/1/3/1/1/131163599/rejiseverelomoxebixi.pdf
    • https://static.s123-cdn-static.com/uploads/4421770/normal_5ffaaf42f3592.pdf
    • https://cdn-cms.f-static.net/uploads/4460950/normal_5fe6d16c169fa.pdf
    • https://cdn-cms.f-static.net/uploads/4448547/normal_5fd624abeb062.pdf
    • https://vokuduvalabi.weebly.com/uploads/1/3/4/5/134502282/redid.pdf
    • https://cdn-cms.f-static.net/uploads/4460476/normal_603674c44885a.pdf
    • https://dodarumobite.weebly.com/uploads/1/3/1/4/131437296/3855183.pdf
    • https://wonakusoxenim.weebly.com/uploads/1/3/5/3/135340368/084c00b27b73a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_2f0c99aad6f64ba0a8e8ade4be01942a.pdf?index=true
    • https://s3.amazonaws.com/bojafazes/21062466269.pdf
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_0f1de7d287b24d818a7eea2fe8013eb5.pdf?index=true
    • https://s3.amazonaws.com/ragejufa/bose_av3-2-1ii_gsx_media_center.pdf
    • https://15e12281-0fef-4bb1-b284-2b61ddec1698.filesusr.com/ugd/6c5390_4eb706bcbb7b41988db23a00404e3266.pdf?index=true
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_3381f5341b8a4b9289ab0122c30777ed.pdf?index=true
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_173163316e444798b6a713b036a386af.pdf?index=true
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_482580acc6754677852004bcabc2dc3e.pdf?index=true
    • https://s3.amazonaws.com/viromibukoleliw/power_outage_report_dominion.pdf
    • https://s3.amazonaws.com/jasipefulaxiduj/46419134418.pdf
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_877de73f83874c57a2574d9631966458.pdf?index=true
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_61fcb900e22b46cba66b5c3696d782ed.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000127e8.bin
caab0091bb0472936c2a8a901592426c1cf86ce54a9d371b867d6492a87d0123		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127E8 5036 bytes
font_01_sfnt_off00013903.bin
170cc31eafc73a5522868cb7c3fce2ebea7f88881e49dc5356d40b7b4562f677		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13903 12476 bytes
font_02_sfnt_off00016079.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16079 4324 bytes

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