Malicious PDF — malware analysis report

Static analysis result for SHA-256 1345a39696232250…

MALICIOUS

PDF

77.7 KB Created: 2021-03-17 06:14:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c73df7adb267594930f724f043af80d2 SHA-1: 7aedfe171ca1e0c0c651d07a03e47373e99431d2 SHA-256: 1345a396962322503c69e31eb9a84b214f0154ef638cdaf7c06ae34a1d935028
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious intent. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a phishing or link-farming scheme. The document body, though heavily obfuscated, appears to be a lure related to 'hardware configuration management plan template'. No scripts were extracted, but the presence of numerous external links points towards a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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
  • 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://jottigo.ru/123?utm_term=hardware+configuration+management+plan+template
    • http://giwitap.getenjoyment.net/learning_english_speaking_books_free_download.pdf
    • http://tonagruz.ru/survival_of_the_fittest_examples_in_tamily898p.pdf
    • http://sawemawe.mywebcommunity.org/poulan_pro_17_25cc_string_trimmer.pdf
    • http://zutatowatipo.mywebcommunity.org/broken_spears.pdf
    • http://rumafelaneli.mygamesonline.org/nopunokemumupelokogudo.pdf
    • https://cdn-cms.f-static.net/uploads/4472486/normal_605130d2852cb.pdf
    • http://wivikaxebox.medianewsonline.com/738296577.pdf
    • https://static.s123-cdn-static.com/uploads/4451205/normal_6008f86f50679.pdf
    • https://kamapapidez.weebly.com/uploads/1/3/5/9/135962567/gukalu-ledewuwegov-dufipu.pdf
    • https://static.s123-cdn-static.com/uploads/4458388/normal_5fe3ea975870f.pdf
    • http://jenewazajasazu.getenjoyment.net/argumentative_paragraph_writing_examples.pdf
    • http://tekplafond.xyz/77353956143qfjnd.pdf
    • https://cdn-cms.f-static.net/uploads/4407304/normal_601dc0421b11d.pdf
    • http://borejukeluteva.mygamesonline.org/2015_honda_odyssey_transmission_fluid_filter.pdf
    • https://daxigowopijadek.weebly.com/uploads/1/3/0/8/130814785/4b9a0e24c29.pdf
    • http://virnet77.ru/4155962408ed1nb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://diwavubodinaroj.myartsonline.com/how_much_time_to_learn_data_science.pdf
    • https://s3.amazonaws.com/zamuriza/pilavur.pdf
    • https://s3.amazonaws.com/wotodedaruzuk/cities_skylines_guide_xbox_one.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f313.bin
7d66e804677b01f2436fd2f001a58d03e8b4c8f059ac321782d251f22564a565		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF313 5352 bytes
font_01_sfnt_off00010549.bin
d3eb79ffb9e816c691e48bd431fb0520c975f2f796be0efa2d5bddf308e7cc27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10549 10460 bytes

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