Malicious PDF — malware analysis report

Static analysis result for SHA-256 3569f6464f361845…

MALICIOUS

PDF

79.1 KB Created: 2021-03-16 23:37:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9251b9ee02dcd1dfd073a3aad8dd05bf SHA-1: 9db516c0f3fb7cf0e6bc3d855f65c78bbd6362cc SHA-256: 3569f6464f361845fc3e50588cbef3da6a2c639a6fafdd5554fa5f4883beb06a
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 embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain product-related keywords, likely serving as a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/wix?keyword=osage+river+tactical+range+bag+light+duty PDF link annotation
    • http://acgmgroup.ru/android_ui_animation_library_githubisoon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371806/normal_5fe07fe22cd5c.pdfIn PDF document text
    • http://datingdate.site/equalizer_11_castut68r.pdfIn PDF document text
    • http://mefizilexofe.66ghz.com/hormone_replacement_therapy_australian_guidelines.pdfIn PDF document text
    • http://crispyset.online/how_is_biogenic_methane_formed3m2na.pdfIn PDF document text
    • http://bavakobo.iblogger.org/bipepajovejikupa.pdfIn PDF document text
    • http://garant-ritual.online/hallelujah_guitar_instrumental_free4u4sm.pdfIn PDF document text
    • http://it50save.info/ablls_r_guidevb6qr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447108/normal_5fde7c5b94adf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384307/normal_5fe6bf522e9f4.pdfIn PDF document text
    • http://parralax.net/pimatipubogumu8j06l.pdfIn PDF document text
    • http://sodahq.pro/28749717706rbsqb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tigufivabuzanoj.epizy.com/biledefotanusinopewi.pdfIn PDF document text
    • http://zezevefo.rf.gd/69279371981.pdfIn PDF document text
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_7b881071a92b4f3682a032c92d7c2fac.pdf?index=trueIn PDF document text
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_6f3d6616d71d45aeb29ba83d75cd36a8.pdf?index=trueIn PDF document text
    • http://watitabetunob.epizy.com/51122054499.pdfIn PDF document text
    • http://xulelaperimiku.epizy.com/77228600984.pdfIn PDF document text
    • http://gutumafik.epizy.com/16135814804.pdfIn PDF document text
    • https://3edbbcf3-b5b1-446e-9630-835d38fa79e0.filesusr.com/ugd/6908d7_53aa45032a1447c290bd94ee2e718317.pdf?index=trueIn PDF document text
    • https://50b44c92-959e-4a15-bf83-93d6b2b518d6.filesusr.com/ugd/3ed44c_c78779fd4a71465abfa1ad41de49af7d.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_off0000f80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 5528 bytes
SHA-256: a4df996fb7c5b529de2ae4adb35a37a13a52ea8af27a6096909f8fd70b1b7611
font_01_sfnt_off00010ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD3 10536 bytes
SHA-256: f2881c7204d66497f11f57c54cb5f0bc59cddd97573689d47a6c4d88891ebcae

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