Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b403c42557d807…

MALICIOUS

PDF

78.1 KB Created: 2021-03-08 20:02:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: de47b38eb345044601c1dc748da0596a SHA-1: a43efa0f137c3e8ada1d64aaf6e95c97df3ae4fa SHA-256: 97b403c42557d8070445fc224de70107aaecf75cb6cf11cdcd11536d22a6af0d
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'periodic table iupac 2020 pdf' search query, likely directing users to a phishing or malware distribution site. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or credential harvesting attempt.

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://seumenha.ru/award?keyword=periodic+table+iupac+2020+pdf PDF link annotation
    • http://najisemure.medianewsonline.com/sony_a3500_lenses.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/24049859123.pdfIn PDF document text
    • http://gejedesoni.getenjoyment.net/10528152687.pdfIn PDF document text
    • https://cdn.sqhk.co/bulelovuroga/ZQheGid/nojalibesinagekizav.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/zibefurapadujixepojavip.pdfIn PDF document text
    • https://cdn.sqhk.co/didatife/hdtTUhb/gopro_4_flashing_red_light.pdfIn PDF document text
    • http://gimatadokij.mygamesonline.org/como_ganar_amigos_e_influir_sobre_las_personas_ensayo.pdfIn PDF document text
    • https://cdn.sqhk.co/nexasolonit/sZQigjg/roman_tower_defense_games.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/76783439125.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vedebimefawimad.rf.gd/49238914883.pdfIn PDF document text
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_8f1f6d731fb94d7dab9775f1ce948d15.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db8a791-640f-476d-b60c-16d2a48b8947/gosigipebepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7e6e40-5f07-4c81-95fd-3da8f343e4bb/what_is_the_present_participle_of_the_verb_listen.pdfIn PDF document text
    • http://bafuwujix.atwebpages.com/87077241032.pdfIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_15929bd59eea4f87998e8aa04bf1fc45.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d7fa1e-621e-4bfa-9b9b-4170ea14c253/the_hunger_games_mockingjay_part_1_soundtrack.pdfIn PDF document text
    • http://munuvuzuwewojef.epizy.com/how_do_i_change_the_input_on_my_toshiba_tv_without_a_remote.pdfIn PDF document text
    • http://mokimonanogi.rf.gd/binomial_distribution_problems_with_solutions.pdfIn PDF document text
    • http://luwegovufa.epizy.com/plague_inc_evolved_fungus_brutal_guide.pdfIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_c9b06bf645234baf8782fe8268689cbc.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59B 5388 bytes
SHA-256: 4c4756cbed72b8fe10aee326eb9fe7c4fbb75eeef72ca5cf88d27e87a0d04097
font_01_sfnt_off000107f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F9 10408 bytes
SHA-256: 6863ffb9a0bb22840ad58fb4c99e66d04c6e9588b2cf9fb3a600e5200aa58c0b

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