Malicious PDF — malware analysis report

Static analysis result for SHA-256 d85316b8dc3230b2…

MALICIOUS

PDF

71.1 KB Created: 2021-02-11 15:38:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 03e813a13ccc3e8e8debd854a060bc71 SHA-1: 638e142fa581f782708c3a21e5149b9d19700a23 SHA-256: d85316b8dc3230b217e2c23eaa06a1f120fbd1e554e9aed343221f497a80ce2a
96 Risk Score

Malware Insights

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

The file is a PDF containing multiple embedded URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests the document is designed to redirect users to external sites, likely for phishing or to download further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=rosario+a+la+virgen+mar%25C3%25ADa+misterios+gozosos PDF link annotation
    • https://cdn.sqhk.co/pobijejok/ZChathe/16342354971.pdfIn PDF document text
    • http://cmb-accueil.com/the_hour_between_dog_and_wolf_wikiyxrlq.pdfIn PDF document text
    • http://lalashoppen.online/beethoven_piano_sonata_13d1yx5.pdfIn PDF document text
    • http://pshcomonhere.xyz/15586470173c2d7f.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/metformin_xr_vs_srtm26a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369173/normal_6000fac79e551.pdfIn PDF document text
    • https://cdn.sqhk.co/sekijebasazi/aigdKSk/famejajivajifa.pdfIn PDF document text
    • http://fujopijur.iblogger.org/the_expanse_imdb_parents_guide.pdfIn PDF document text
    • http://draiwenstore.online/murray_ms2550_weed_eater_manualr96m8.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/hahfeS9/33708261400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444100/normal_600caeb9b0214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_601e840c2a059.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/sojebelevenex/91341036869.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/chu_chu_tv_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/72706975158.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/great_value_whole_wheat_bread_nutrition_information.pdfIn PDF document text
    • http://dukutogesedu.epizy.com/73046745614.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/43640101611.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/89019345805.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_off0000d5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D4 5176 bytes
SHA-256: 584dba749be85c8326c5a13fb186e39b57ecf3915b6bd3514aebb70126a6a1c8
font_01_sfnt_off0000e770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE770 11528 bytes
SHA-256: 69f89449e16fe32ba6d20b3d32e2e553c18c9a8c5597f390505402b878c733f3

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