Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c07f9008e0cd07b…

MALICIOUS

PDF

75.0 KB Created: 2021-02-26 01:55:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 4e979508d4a8fc39327223b266c6fcb5 SHA-1: 1e8e0d7a0ed88d9e793eecb3eb907dcc5b758aec SHA-256: 9c07f9008e0cd07b79d6cfaaf3d6f6aa2a49437ab26524a98ea2be5d360c24f5
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, designed to create a link farm. The presence of a URL with a search term like 'microsoft project 2013 free download' suggests a lure for users seeking software, which is a common phishing tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://bologen.ru/aws?utm_term=microsoft+project+2013+free+download+for+windows+10+64+bit PDF link annotation
    • https://cdn.sqhk.co/janogoxuke/JojbhaC/wajimuwozalalidopaka.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/hKjbms2/lonelal.pdfIn PDF document text
    • https://cdn.sqhk.co/rodofusavivi/heheeML/monster_hunter_stories_egg_shards.pdfIn PDF document text
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/6137102.pdfIn PDF document text
    • https://ludiwutigavas.weebly.com/uploads/1/3/4/6/134697468/2563322.pdfIn PDF document text
    • https://talunijepi.weebly.com/uploads/1/3/4/5/134599753/zekurunolobi-lutexi-pazumerope.pdfIn PDF document text
    • http://gedawirij.66ghz.com/lagu_neffex-_never_give_up_copyright_free.pdfIn PDF document text
    • https://cdn.sqhk.co/molewekane/jcibZxO/47854308877.pdfIn PDF document text
    • https://dekaraguw.weebly.com/uploads/1/3/4/5/134511216/fumefevovefoj-taxep.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/dhj1hbu/jaterifulipudon.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/giihdN4/bawejojovovotogovum.pdfIn PDF document text
    • https://zogoporev.weebly.com/uploads/1/3/1/3/131381602/xutipesoduz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luselobek.epizy.com/record_background_blur_videos_android.pdfIn PDF document text
    • http://suvegome.epizy.com/dedowev.pdfIn PDF document text
    • http://todosix.epizy.com/england_manchester_ground_weather_report.pdfIn PDF document text
    • http://fudojozijenabux.epizy.com/8432517386.pdfIn PDF document text
    • http://fefemegazo.rf.gd/application_for_australia_visitor_visa_form_1419.pdfIn PDF document text
    • http://kulekedeziwab.epizy.com/badaga_new_songs_free.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_off0000e30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30C 6192 bytes
SHA-256: f79e5b741f724ddb60aa6be4d013e5bc4a5811ef763290ef0a9037dcef3f6be5
font_01_sfnt_off0000f847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF847 11008 bytes
SHA-256: 0f6ffd4d2c072cf736f960731efa3a3abe19387a5e29f994251fa9311274ed70

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