Malicious PDF — malware analysis report

Static analysis result for SHA-256 070e9150091c3367…

MALICIOUS

PDF

79.3 KB Created: 2021-03-25 23:19:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 596feb09971a6efd227498840b8f3652 SHA-1: 54fd39311ce632abe9675bf77e3e426d00aaa1dd SHA-256: 070e9150091c3367e9334de0f256f20a99f9826aca52b3760e856c98a18e0a08
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'ponafet.ru' which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'fundamental of anesthesia books pdf', indicating a social engineering attempt to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://ponafet.ru/award?keyword=fundamental+of+anesthesia+books+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425491/normal_602c36b62f76d.pdfIn PDF document text
    • http://topmassage.net/25121189960ifjag.pdfIn PDF document text
    • http://sethel.xyz/xamaginilup5gzf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465003/normal_60228bf0b151e.pdfIn PDF document text
    • http://grampus-shop.com/11750761525nb0ru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417530/normal_5ff3f5537416c.pdfIn PDF document text
    • https://cdn.sqhk.co/xogiwusumo/ZBGVzOi/short_life_2_level_4.pdfIn PDF document text
    • http://hotita.fun/kenoleteapn24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486778/normal_602686cd7d691.pdfIn PDF document text
    • http://beremoter.online/predator_8750_generator_oil_capacityt8mal.pdfIn PDF document text
    • http://alteramaks.world/9449947913315kag.pdfIn PDF document text
    • http://bigtittybella.com/moral_stories_in_telugu_to_write_with_pictures203xn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387036/normal_5fd6d0d84329a.pdfIn PDF document text
    • https://cdn.sqhk.co/paxepedamaxa/hf6hjqU/tewit.pdfIn PDF document text
    • http://bluebadgeform.com/dm_screengge8e.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/belapawerezuju/how_do_i_factory_reset_my_centurylink_modem.pdfIn PDF document text
    • http://watowuxamomipig.rf.gd/povijove.pdfIn PDF document text
    • http://tuguxukoz.epizy.com/does_hulu_have_the_shining.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/70639726099.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/fopuwekukurenagunufaxug.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/33819435108.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81B 5344 bytes
SHA-256: 89b92ee6489496c22c5990a9c3aa23a1614a678bb5e77dfcbc9ea34c57efa544
font_01_sfnt_off00010a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A26 11016 bytes
SHA-256: 5025bc535dfaf218b9a41db739bc076ea57a55464087b33432581b5387e623e1

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