Malicious PDF — malware analysis report

Static analysis result for SHA-256 97051f3c5552112f…

MALICIOUS

PDF

92.2 KB Created: 2021-03-20 20:08:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: dd9c7940b1ec0c49dd6af907abac241b SHA-1: d841d22688b7b615b12fb16b55c1aefe545eb032 SHA-256: 97051f3c5552112f6f06fe3344f211d070f59da45032f70fc737950103d18213
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, indicating a high likelihood of malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to a 'Tasco telescope eyepiece', which is likely a lure to direct users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jacksth.ru/aws?utm_term=tasco+telescope+eyepiece PDF link annotation
    • http://snatural.space/free_video_downloader_chrome_browserfps2m.pdfIn PDF document text
    • http://sun-italy.space/how_to_sync_firestick_remote_to_tv_volumee93n9.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/ehiE3gi/86700202104.pdfIn PDF document text
    • http://vovidumuf.22web.org/difixubil.pdfIn PDF document text
    • https://cdn.sqhk.co/dedejosewor/jcToc6T/rukutusoba.pdfIn PDF document text
    • http://fusojosejivo.iblogger.org/cellsentials_usana.pdfIn PDF document text
    • http://daimontimur.org/lipopojemipekulohwimw.pdfIn PDF document text
    • http://alex-chekalev.com/persuasive_speech_outline_template_wordx78qj.pdfIn PDF document text
    • https://cdn.sqhk.co/teganipuputu/em0Gij2/prop_hunt_code_fortnite.pdfIn PDF document text
    • http://telewapor.22web.org/condom_size_guide_skyn.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/TrijIgn/pulse_secure_network_connect_9._1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gasigigi.rf.gd/golukix.pdfIn PDF document text
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_dcc30a443f32493bb269d3a11a714f9d.pdf?index=trueIn PDF document text
    • http://fadoxom.epizy.com/what_is_a_safety_corridor_on_an_interstate_highway.pdfIn PDF document text
    • http://velumosak.epizy.com/41048361936.pdfIn PDF document text
    • http://musezuw.rf.gd/jemawonodowusizexevi.pdfIn PDF document text
    • https://9305c775-266c-4126-9ef9-90a5cffee957.filesusr.com/ugd/c3f88d_60937a00229040a6b7bb2a91127290ed.pdf?index=trueIn PDF document text
    • http://xaxidos.epizy.com/alphabetical_index_template_word.pdfIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_fbc5424eb65d4baaa0036b1f494d97f1.pdf?index=trueIn PDF document text
    • http://xesewopalokix.epizy.com/madisadelis.pdfIn PDF document text
    • http://dexidije.epizy.com/wotoxirejurume.pdfIn PDF document text
    • http://putudodizisag.epizy.com/mupufagubi.pdfIn PDF document text
    • http://xotibebigugipan.epizy.com/93207321300.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_off00012bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC9 4884 bytes
SHA-256: f6ed0933b491404eb9e1783bfea4df40735223dd7615e271c991c86c17082769
font_01_sfnt_off00013c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C82 11560 bytes
SHA-256: 45f00b132299ea9cdd3bdeffd90116c027c39ceed2de6554b5ea45a7e07f7827

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