Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64be325af041f20…

MALICIOUS

PDF

75.5 KB Created: 2021-03-03 02:02:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2d2d174eb102ee28167b2d9c08745d3e SHA-1: 30de6cadc18d7714c87e35f85a1c63279a60098f SHA-256: e64be325af041f208efa933399dbd0049e01a2119397de1457d9cbfe25fafb60
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure.

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://xezojetit.ru/123?utm_term=are+biddeford+electric+blankets+safe PDF link annotation
    • https://cdn.sqhk.co/dawadetugas/haRyjdU/guresagebupopim.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/hrjedge/idle_gun_tycoon_gameplay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373516/normal_601dbeee0c431.pdfIn PDF document text
    • http://wejnpowk.space/how_to_read_a_poem_terry_eagleton_notesl3iaj.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/hhkwje5/gevamaxofazokami.pdfIn PDF document text
    • https://cdn.sqhk.co/sikibeve/ifjfggC/28086470455.pdfIn PDF document text
    • http://opit.space/osteoporosis_guidelines_philippines01xo5.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/bigjagc/applocker_mac_download.pdfIn PDF document text
    • http://investmag.org/how_many_ragas_in_indian_musick6kgp.pdfIn PDF document text
    • http://torchland.xyz/how_to_fix_a_leaking_glass_water_dispenser0rtrl.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/vokeri/90798795807.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/64118990727.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/vejazutiwojabub.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/rozif.pdfIn PDF document text
    • http://lofekelatek.epizy.com/dafositawitepujis.pdfIn PDF document text
    • http://bikilut.epizy.com/reading_books_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/pejezuli.pdfIn PDF document text
    • http://runozozupegefo.epizy.com/50189240741.pdfIn PDF document text
    • http://fudavifakafolid.rf.gd/megasemodinizobavuf.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_off0000e9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F5 5208 bytes
SHA-256: 18f715b797c1759ec1fae17dcb757418425d93658a91c78933e43a2b618f9289
font_01_sfnt_off0000fbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBC 10860 bytes
SHA-256: 41e509e8469ccc19d53ee2d01c767866149638a5f8a72484cd15e642433296ce

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