Malicious PDF — malware analysis report

Static analysis result for SHA-256 add9fcb56ef7026e…

MALICIOUS

PDF

86.4 KB Created: 2021-02-24 20:11:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4e632244fd6640d5ce3bd604efa69789 SHA-1: 1037119b49e7139adee03dd1f2f7b5d78f57c299 SHA-256: add9fcb56ef7026e3f099e22984949a5d651f3c74e1d04ff43ac137e1097d8d4
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 0.9998

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://druttle.ru/wix?keyword=classic+alchemy+gold+guide PDF link annotation
    • http://sberin.xyz/hitman_sniper_including_a_domino_killc8dir.pdfIn PDF document text
    • http://petersikdar.com/endocrine_system_lesson_plan_high_schoolugwy6.pdfIn PDF document text
    • http://perinolaguzur.iblogger.org/paige_spiranac_golf_swing_video.pdfIn PDF document text
    • http://vipadminler.org/zuguvepadamesazulodokeposl3gfs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446496/normal_60031eed8aab5.pdfIn PDF document text
    • http://nijowefipegivu.iblogger.org/sebav.pdfIn PDF document text
    • https://jetujipizi.weebly.com/uploads/1/3/0/8/130813705/0c3192df3.pdfIn PDF document text
    • http://ighelperscenter.com/nukenebusevabemats8rg5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421782/normal_6028eb98f1e4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447096/normal_6010ef897e6f3.pdfIn PDF document text
    • http://vowugewekoperak.iblogger.org/fjllrven_polar_guide_parka_test.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/begin_again_mona_kasten_espaol9fo9h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jadupapobixe.epizy.com/89416355406.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/uc_browser_software_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/apoorva_sagodharargal_songs_in_starmusiq.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/72964962117.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/rorigemugubefasap.pdfIn PDF document text
    • http://jitapalerex.rf.gd/fusujixumutobewiwid.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_off00011653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11653 5264 bytes
SHA-256: 476d189241c71bf382bb01c95138a64749c732b404cae6667dcfc36a2dccd81c
font_01_sfnt_off00012818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12818 10684 bytes
SHA-256: 57243c43e6d04feeb5b48d5e2921af0e1293a77afaa80bff5566da715ecd4c09