Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c21580d14daebd8…

MALICIOUS

PDF

69.7 KB Created: 2021-03-14 20:30:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dce2a089e283f96d6e7cae798245fc28 SHA-1: 53ee7f9ddb1b9f200f30eb9f069e0f6481f078f6 SHA-256: 9c21580d14daebd8f1ec0feefc944ca28ab926dab9387b37ba441ac82e46cf4e
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, which is also listed as an IOC. ClamAV detection and ML classification strongly indicate maliciousness, specifically a phishing trojan. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

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://lozipotod.ru/123?utm_term=basanta+bilap+bengali+movie+free
    • https://cdn.sqhk.co/dixufeja/Pig9Whi/street_racing_syndicate_cheats_xbox.pdf
    • https://cdn.sqhk.co/velujuvaxal/ajaii2l/gafikurupawat.pdf
    • http://modezewop.mygamesonline.org/nabofogozosukumukudawul.pdf
    • http://gadatoreneperil.mygamesonline.org/rilusozopes.pdf
    • https://cdn.sqhk.co/mewuwemiromi/jbJ7Okg/gofipemesupapisu.pdf
    • http://gazajujana.mygamesonline.org/mefovosemas.pdf
    • https://cdn.sqhk.co/nuxasedazu/ZCX6ehe/abc_song_lyrics_new_version.pdf
    • http://afracheat5.xyz/39806473220l03nz.pdf
    • https://cdn.sqhk.co/jufebarur/6gHP2Ke/91909835172.pdf
    • https://cdn.sqhk.co/nogorodizet/hdqghhe/69343259451.pdf
    • http://armada.technology/dezofanubofusakemogijfgu50.pdf
    • http://my-favshopf.online/dark_tower_series_in_reading_orderz15yk.pdf
    • https://cdn.sqhk.co/disumuneriva/ejiVRjb/31033234496.pdf
    • http://lejifip.sportsontheweb.net/minodinilaso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9337204c-131a-49b3-b98d-e058877713dd/21_pilots_stressed_out_lyrics_az.pdf
    • https://uploads.strikinglycdn.com/files/aa3ce5d1-c055-46ce-a9c6-c169238ad5df/19284236073.pdf
    • https://s3.amazonaws.com/jotogorurekuro/is_fisher_price_infant_to_toddler_rocker_safe.pdf
    • https://s3.amazonaws.com/xutomoxu/95803409709.pdf
    • https://uploads.strikinglycdn.com/files/616294f1-ecb5-4e33-9953-328c9e4812f0/osrs_ancient_prayer_book.pdf
    • http://muluwokixo.onlinewebshop.net/how_to_write_titles_in_ap_style.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d31b.bin
20b8a950391104f920716d159210895369ed3c00f20f0db30d382f1132840b74
pdf-font-stream PDF embedded font (sfnt) at offset 0xD31B 5472 bytes
font_01_sfnt_off0000e5ab.bin
5e34d3636b86d4d2db9f434a4b81c0fa89c599f2366b8c8aac5ceede875ab519
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AB 10640 bytes