Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b65b04ab5ee9a0…

MALICIOUS

PDF

81.2 KB Created: 2021-02-16 00:13:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 74f6654f1addc02856e8dfa4b0f929e8 SHA-1: b00ff4f945f262f60c40d21b2bbd512db5dff75f SHA-256: 46b65b04ab5ee9a022a7d61e1c99dad52cce0ab6c34970ea44eee0fe606a38ef
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous external URIs, including one that appears to be a redirector for a link farm, suggesting an effort to obscure the ultimate destination of malicious payloads. The presence of embedded URLs and the nature of the heuristics point towards an attack pattern designed to trick users into downloading further malicious content.

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://jacksth.ru/123?utm_term=the+road+cormac+mccarthy+pdf+with+page+numbers PDF link annotation
    • http://freds.space/color_bounce_ballsin90p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380072/normal_5fe5abd5a5e5a.pdfIn PDF document text
    • http://rankingcoach-apps.com/mibotozuxuzuloderofumopidw4p6r.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/hieibgc/does_frndly_tv_work_on_apple_tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365570/normal_5fee6f50e738b.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/adiemus_songs_of_sanctuaryxjs5n.pdfIn PDF document text
    • http://tukazijib.22web.org/tekken_game_for_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/gotofebelu/ifxhdjb/neon_drive_nintendo_switch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455375/normal_5fdbde0a5fa0e.pdfIn PDF document text
    • http://onsideball.info/besajowezebije8ks51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366637/normal_5fed96a21b464.pdfIn PDF document text
    • https://zafudibibini.weebly.com/uploads/1/3/4/1/134108698/gulagelunadabizozeku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489041/normal_5fddcf21a0719.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/konizugug-loziwofogopuni.pdfIn PDF document text
    • https://dakewamegiru.weebly.com/uploads/1/3/5/3/135305658/9879679.pdfIn PDF document text
    • https://cdn.sqhk.co/pulijidapis/gjEkU9O/silver_cloud_financial_interest_rates.pdfIn PDF document text
    • https://tojalalegeb.weebly.com/uploads/1/3/4/5/134584715/goresubetiruvep-lenujibogebar-fogadutib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fukasutatota.rf.gd/21036217995.pdfIn PDF document text
    • http://radujexoxetapil.epizy.com/65841733331.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF91 5820 bytes
SHA-256: 6a0ee30f8d4c4eb84662a325f6dd01bd7614e513878432ecadc5d6a55566d483
font_01_sfnt_off00010351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10351 10584 bytes
SHA-256: 507ed6fcc59838ff7e28a1a0b96e05abd72abccb26898998e49ab82014c1ff51
font_02_sfnt_off000127a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A7 6084 bytes
SHA-256: f5fe2de525700542684e23a11f1cb185b9ffab030677c6a48f3d5a1088c9e53b

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