Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07cda546c27d34e…

MALICIOUS

PDF

72.4 KB Created: 2021-02-17 01:03:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8ef92b526eb29afb875fa9014df0774d SHA-1: 59494ed17504a11865c77cf43b6261c3fcbcb6cd SHA-256: f07cda546c27d34e53cec6a4990e5a0e6e85a1895bd903ef56c0507406d51953
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=cheats+for+simpsons+tapped+out+unlimited+donuts PDF link annotation
    • https://cdn.sqhk.co/vuzefegevo/YjchiBd/diamond_quest_don_t_rush_apk.pdfIn PDF document text
    • http://axecheat9.xyz/nfl_network_spectrum_rochester_ny3l1zi.pdfIn PDF document text
    • http://weex.info/winaxekufedetipobovux5h6j.pdfIn PDF document text
    • http://4kuhd.me/rooster_in_my_rari_meaning9xqvn.pdfIn PDF document text
    • http://alsamcctv.com/116312731723gjix.pdfIn PDF document text
    • http://weareanonymous.org/65280250924brxee.pdfIn PDF document text
    • http://vostokzapad.su/24791953205m5dse.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/galvanized_iron_sheet_rustjdmnu.pdfIn PDF document text
    • http://znatural.space/vauban_prime_build0k0zl.pdfIn PDF document text
    • http://huaweistoreukr.xyz/juicio_de_identidad_de_persona4go1r.pdfIn PDF document text
    • http://lumacy.site/ssb_screening_testglxzb.pdfIn PDF document text
    • http://lnstagramcentre.net/raw_file_converter_ex_3.0_powered_by_silkypix_manualvjs75.pdfIn PDF document text
    • http://hookup681.site/unity_2d_animation_packageah4mm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dfdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDC 5188 bytes
SHA-256: 0eadda76555b4a65d36c166a7f459d1b095d0c001e114718c09710b91c40aad0
font_01_sfnt_off0000f152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF152 10332 bytes
SHA-256: 816ac13d9970ec44ebe04d555a4fb54d706c18b5c274105d60e0f2cdde0cf46f