Malicious PDF — malware analysis report

Static analysis result for SHA-256 154da111d1be198b…

MALICIOUS

PDF

77.5 KB Created: 2021-02-23 06:24:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d7bbf7fb8ca8a76781f59ace5ec88d5e SHA-1: 14598479dd70ed240cbfc89ad251c366876b5b22 SHA-256: 154da111d1be198b65da264763b9c2c81f4897dd1524e5f88eee88cc5fd64e4c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to disposable domains and identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure and embedded links suggest it's designed to trick users into visiting potentially harmful websites.

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://leonvi.ru/wix?keyword=golden+son+pierce+brown+pdf PDF link annotation
    • http://ibkreactiva2020.com/tamilrockers_tamil_dubbed_movies_20140uctp.pdfIn PDF document text
    • http://italywow.space/lulu_guided_reading_levelcmwmr.pdfIn PDF document text
    • https://cdn.sqhk.co/lifudidu/jfhbSjX/life_is_strange_comic_box_set.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/nejakimemisoximiba6zmz.pdfIn PDF document text
    • https://pagopejej.weebly.com/uploads/1/3/5/3/135315805/2940843.pdfIn PDF document text
    • https://bapixive.weebly.com/uploads/1/3/4/3/134393773/2506100.pdfIn PDF document text
    • http://wei-nmvc.com/paradise_island_apartmentskk72q.pdfIn PDF document text
    • http://aromaita.space/558177933092io1t.pdfIn PDF document text
    • http://zzzmmmmejjj.space/zoxuwibukud1ugdt.pdfIn PDF document text
    • http://laura-egorova.ru/andropen_office_apk_prorjaw9.pdfIn PDF document text
    • http://goodnaturak.space/64128012749xjav8.pdfIn PDF document text
    • http://everydayy.fun/58611359372wvg5o.pdfIn PDF document text
    • https://xivafotipumi.weebly.com/uploads/1/3/4/3/134322080/jugebitarafo.pdfIn PDF document text
    • http://homiak.fun/84955257235n9kzn.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/Mhcjhje/sandeep_maheshwari_love_quotes_in_english.pdfIn PDF document text
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/db5ea.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/zoxewudunigus/android_os_latest_update.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/labiotte_sheet_mask.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_off0000f355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF355 5200 bytes
SHA-256: 561b37bf93a13ea81b99cc58971dcfd3544f4cefc0431d24d62604e1b681ebdd
font_01_sfnt_off00010529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10529 10348 bytes
SHA-256: 72417034c14b0a8fc774ee6808fc0b8e899b6efb75e49be82ed2cc3c43e09eda

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