Malicious PDF — malware analysis report

Static analysis result for SHA-256 06444763c43a8de4…

MALICIOUS

PDF

72.3 KB Created: 2021-03-18 09:04:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cd7b8d767b32f999eb3c63c8a1ecca0d SHA-1: 98c327b3fb3ae82274f60a03afe6a7e2c7797d51 SHA-256: 06444763c43a8de4b68a6d62ff48c6e6dec20427445b5b4124d0d306ef300788
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://leonvi.ru/wix?keyword=algebra+readiness+test+8th+grade PDF link annotation
    • https://cdn.sqhk.co/xuzalolotagi/dblhhbq/soccer_ball_psi_size_5_fifa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461207/normal_60019efc03ae4.pdfIn PDF document text
    • http://busigexexowo.22web.org/local_weather_report_please.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378607/normal_5fe6b85ad16b9.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/5eYijhf/airtime_loadup_app_download.pdfIn PDF document text
    • http://senogibe.iblogger.org/shrimad_bhagwat_katha_gujarati.pdfIn PDF document text
    • http://fuguzelinufi.22web.org/kexolikewununanudu.pdfIn PDF document text
    • http://pilarivem.22web.org/42483930943.pdfIn PDF document text
    • http://vagokij.iblogger.org/vipebikoxojawimu.pdfIn PDF document text
    • https://cdn.sqhk.co/jaguwubax/jfgjBjd/fixuleponowuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_603c1f1eaebff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465707/normal_5fdb002c634a9.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/ghl9jad/senet_board_game_rules.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/foneniz/dixomeri.pdfIn PDF document text
    • http://zigejobo.epizy.com/types_of_thrust_bearings.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/snuggle_fabric_softener_sheets.pdfIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_c14d8fe16e744601875b5027548dbaec.pdf?index=trueIn PDF document text
    • http://juninowixa.epizy.com/sscn._bkn._go._id_download.pdfIn PDF document text
    • https://e33362eb-94ba-4427-a888-6f4863169a18.filesusr.com/ugd/36ce96_64332140569a4f20a007aa62796085a2.pdf?index=trueIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_3e6d91307b9443f8a1a83d2d42be00a9.pdf?index=trueIn PDF document text
    • http://bajobakokela.epizy.com/visepibaw.pdfIn PDF document text
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_a8a41fbfb4d44f97b53517557bc5f92e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/93670908100.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC0 5408 bytes
SHA-256: 52952fdfd56a5c432e2443ac0c337038cc4b1f2795d6ffc0519ed625edaffcc9
font_01_sfnt_off0000ef11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF11 10800 bytes
SHA-256: 523aa1d8dcba52c9a277afe575ba5c04f5d266cf77fa413363729bc9db4836a6

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