Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead68c3e8af9c5c8…

MALICIOUS

PDF

65.4 KB Created: 2021-04-03 01:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 54f0a63869e5feebd6924518772d8fe8 SHA-1: 16424b44c6f4415939577d197d9ae04399b57366 SHA-256: ead68c3e8af9c5c89df7215f067f6b1e1d81eb36895164a62aab0d9c8715ff76
184 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The embedded document body, though heavily obfuscated, contains metadata suggesting it's a PDF generated by wkhtmltopdf, likely to disguise its true nature. The primary attack pattern involves redirecting users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9676

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://druttle.ru/strik?utm_term=a+visit+from+the+goon+squad+powerpoint PDF link annotation
    • http://lumobumekola.getenjoyment.net/new_bible_commentary.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvopone/hjMjcKs/39603724059.pdfIn PDF document text
    • https://cdn.sqhk.co/lojumisebu/ge5ifig/vefogulupet.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/Siah2U1/45366610340.pdfIn PDF document text
    • https://cdn.sqhk.co/rowagana/4ihoL2d/99406122096.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/kR1z5ig/oscar_de_la_renta_sunglasses_case.pdfIn PDF document text
    • http://chelobaka.space/ammyy_admin_3._00xxesi.pdfIn PDF document text
    • http://roxifij.22web.org/carcassonne_board_game_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/id77xab/elifoot_19_20_pro_apk.pdfIn PDF document text
    • http://salonlabs.xyz/86537765165bjwom.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/fMvYnm2/najaziliv.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/Vmgfhga/lebepidu.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/hihbidu/54730318926.pdfIn PDF document text
    • http://idealslimitalia-official.site/4168254046413qsc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fopajika.epizy.com/balada_insan_muda.pdfIn PDF document text
    • https://fa3f2985-242d-4a4c-93c0-6adbfb259eaf.filesusr.com/ugd/8dbe7a_b81d0e6f0c1e4c7dae234c8e81d61033.pdf?index=trueIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/caso_clinico_de_cirrosis_hepatica_por_alcoholismo.pdfIn PDF document text
    • https://c3f0ce02-b953-40d9-b94a-e38a054f9a35.filesusr.com/ugd/7afb62_81ee9b592e9a4c9cb9b73cd7d3fa1fdf.pdf?index=trueIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_4a6d23a9fe54407a9fcc5e1010437b25.pdf?index=trueIn PDF document text
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_cd1ec2b2c9714781b2c28d6b80a13365.pdf?index=trueIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_f04b8571cb9340ad93e72d45bf585a64.pdf?index=trueIn PDF document text
    • http://zararogesa.epizy.com/3841791116.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB99 5692 bytes
SHA-256: fce3a2f95a5de53850b2a6fd9e86d845a7299f6760d091ad419550b9e614c4f2

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