Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3a3f0a1edde8b6…

MALICIOUS

PDF

90.8 KB Created: 2021-05-04 06:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b5b191562de9f43817a16e1437b51c03 SHA-1: 50cf6295366169579949cb2763d42fc331a7c8bf SHA-256: 6c3a3f0a1edde8b600d79315eb47610971b5569d3b08862770fd49ad260b11eb
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 0.9997

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://botokaw.ru/strik?utm_term=what+does+qualitative+evaluation+mean+in+chemistry PDF link annotation
    • https://pozusope.weebly.com/uploads/1/3/1/4/131453674/1374957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_60285df8a0a06.pdfIn PDF document text
    • https://cdn.sqhk.co/zugivakizo/jhfhahe/grumpy_cat_movie_director.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_6045c582d4b8a.pdfIn PDF document text
    • https://cdn.sqhk.co/dojiwazufek/2gcKies/17480393204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474980/normal_6025908316e22.pdfIn PDF document text
    • https://sedanafijokam.weebly.com/uploads/1/3/4/8/134888359/xukita.pdfIn PDF document text
    • https://fifusikusivupe.weebly.com/uploads/1/3/4/6/134638905/nemovaguxosa_jitosafejotimeb_bizumupu_taladezetekami.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450438/normal_5ff9bff9ca746.pdfIn PDF document text
    • http://tagaporigowekis.mygamesonline.org/49304449445.pdfIn PDF document text
    • https://cdn.sqhk.co/sazuzaxokuk/cd1y0Oj/4467553688.pdfIn PDF document text
    • http://dororuminaxa.mywebcommunity.org/naming_and_classifying_angles_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/kiranagel/iPhj1JC/naponoja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/57d78c97-d731-469c-b018-c15002ea3396/jail_time_for_3rd_degree_felony_in_ohio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d27dde58-8b6a-4b18-97c0-ff81d9ed4af0/what_is_the_us_legal_system_based_on.pdfIn PDF document text
    • https://f16fa5c1-8556-4bba-8f86-04d9c108beb0.filesusr.com/ugd/2c3d75_6514942d6a614354a50dee6bfaf5a537.pdf?index=trueIn PDF document text
    • https://c4cd0dbc-23d7-4f11-b65f-2561cec8abe5.filesusr.com/ugd/516793_1d9a5736ac5a477a94b4db23879e2e4e.pdf?index=trueIn PDF document text
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_e0864b47787044bf9f9aad560ceafebe.pdf?index=trueIn PDF document text
    • https://de99934f-f465-4d69-af5e-14f317c0a7c6.filesusr.com/ugd/4fea5c_8cdb26ab0e204448a7d13b8b668c399d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/779779dd-44cf-464a-9f2b-57afcffcd5e6/the_lightning_thief_musical_songs_ranked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e9795e6-fcfb-4b83-80d7-0f56675bc838/buzuja.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_off00012108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12108 5480 bytes
SHA-256: 3b456c1fa39a3c3a3fcdbe40f7fb29bea88590e817f42f38874925fa97d3a09a
font_01_sfnt_off00013392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13392 13244 bytes
SHA-256: b5151d5abe42f76f295d0665b467a032d1d3467bc33b923a2e111a56cf14ff86

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