Malicious PDF — malware analysis report

Static analysis result for SHA-256 44322d0ae9a4b941…

MALICIOUS

PDF

87.3 KB Created: 2021-03-31 02:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1115f1c137ecf54b26d3504194107fc1 SHA-1: 8ec62db56aa7757288de853bd4deb3c79c03e0fd SHA-256: 44322d0ae9a4b941f8919d09b3106237473d43005e546965542adbe608f54dc5
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://soxebez.ru/award?keyword=instruments+used+in+chemistry+lab+pdf PDF link annotation
    • http://forexgeeks.net/adopteunmec_apk_crackedd4xom.pdfIn PDF document text
    • https://kovapuneluwaze.weebly.com/uploads/1/3/2/3/132302913/067bcf5883df31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392667/normal_5fd786070d6d7.pdfIn PDF document text
    • http://daduriwikoniza.22web.org/21516026540.pdfIn PDF document text
    • http://sadogiropi.mypressonline.com/71878215958.pdfIn PDF document text
    • https://zokofefedepop.weebly.com/uploads/1/3/1/4/131437243/momeg-papuwukuxu-bajigixetulewi-pekategig.pdfIn PDF document text
    • http://xanevejesofag.mygamesonline.org/2_step_equations_with_fractions.pdfIn PDF document text
    • http://d2-club.ru/9556674601hpn6i.pdfIn PDF document text
    • http://purpless.vip/volume_of_prisms_and_cylinders_corbett_mathszwopn.pdfIn PDF document text
    • http://sidixul.iblogger.org/ieee_802.15.4a_standard.pdfIn PDF document text
    • http://gvidilon.ru/premier_protein_caramel_net_carbs1l8dl.pdfIn PDF document text
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/2464540.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/hematology_analyzer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367273/normal_5fca868e1022f.pdfIn PDF document text
    • https://luxutavu.weebly.com/uploads/1/3/5/9/135964445/5578133.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/4342250.pdfIn PDF document text
    • https://nutiniwe.weebly.com/uploads/1/3/4/8/134870290/07221ca5ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391326/normal_602274f69d427.pdfIn PDF document text
    • http://tideparipawovu.mygamesonline.org/burial_rites_analysis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://didefiwofiko.rf.gd/recetas_alimentos_alcalinos.pdfIn PDF document text
    • http://jabejanaboz.atwebpages.com/accountancy_class_12_state_board.pdfIn PDF document text
    • http://sozufig.rf.gd/classify_triangle_worksheet.pdfIn PDF document text
    • http://vosivoru.epizy.com/wegun.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_off000112bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BD 5576 bytes
SHA-256: 87562131d50e78a92645117f38a709ff754affbe8475cf959b317f20c44ff553
font_01_sfnt_off0001258a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258A 12056 bytes
SHA-256: 66e61f7fd49efd986dcfdd88bfa78c30e700b509eb713641290dc5fb005decf6

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