Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a98de09c6aa9bc2…

MALICIOUS

PDF

85.6 KB Created: 2021-03-14 01:02:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 88633cc592128f5b275a11bbf490f2e9 SHA-1: 4473ce377493804aa82b9a2872462a27dfc3a202 SHA-256: 7a98de09c6aa9bc2e59ba859f9471aa3289cbb2ba69ff99dd9384ce564395854
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating a link farm and an embedded URI pointing to 'mezovuduw.ru'. The document body, though heavily obfuscated, appears to contain search-like keywords. The presence of numerous external links, including one to 'nunofisodopuw.weebly.com', suggests a phishing or content-scraping lure designed to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • 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://mezovuduw.ru/wb?keyword=how%20do%20i%20reset%20my%20rv%20thermostat PDF link annotation
    • https://nunofisodopuw.weebly.com/uploads/1/3/4/2/134234763/8145b9cb2f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446285/normal_6036ade28544d.pdfIn PDF document text
    • https://jinunezig.weebly.com/uploads/1/3/4/3/134308797/gadagefowigodupi.pdfIn PDF document text
    • https://depasosuva.weebly.com/uploads/1/3/4/4/134483816/8373766.pdfIn PDF document text
    • https://sawamamuwez.weebly.com/uploads/1/3/5/9/135992332/fujusamu.pdfIn PDF document text
    • https://wabalolosezuluf.weebly.com/uploads/1/3/4/4/134462862/806609.pdfIn PDF document text
    • https://badumanonelom.weebly.com/uploads/1/3/4/0/134040969/xizova-dazanek-gebasujifobin-guvizu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497666/normal_5ff4eaa671439.pdfIn PDF document text
    • https://lokugejepotag.weebly.com/uploads/1/3/4/3/134318746/modepiko-mubezok.pdfIn PDF document text
    • https://dibasipelop.weebly.com/uploads/1/3/0/7/130738559/20676.pdfIn PDF document text
    • https://rejosunofefi.weebly.com/uploads/1/3/0/8/130874376/wakegimiriniwidu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/85990038037.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/maytag_bravos_mct_washer_not_spinning_fast_enough.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/taekwondo_blue_belt_form_step_by_step.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/45420539850.pdfIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_41e5ca0900aa4bf8adf21418ad6a1a96.pdf?index=trueIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_3b782fda25424a17a7bc46c504c9309b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/ich_liebe_dich_beethoven_sheet_music_free.pdfIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_23a45db26adf4138a12e67731500755f.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF797 5248 bytes
SHA-256: 338b09b77ff423d2b9021db8f730494303904ddd546bf62927908d0bfe0b65f9
font_01_sfnt_off00010958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10958 11016 bytes
SHA-256: 6af27157182c7c01fbf918e788a369ecaa5b06194f1ce1ca4cfcbf5bcd9a043d
font_02_sfnt_off00012eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB8 17660 bytes
SHA-256: 5c25476c9ef6952ca91814ac050837d5db411fd860d491aa5f110a3f41ddd1d4

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