Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb1e3ef3ad04d622…

MALICIOUS

PDF

77.4 KB Created: 2021-06-03 17:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 79b59b356b5fcfc085a49904377b1b3b SHA-1: 954f8a47501e51f9c652255cdd82a6eb70ea6b85 SHA-256: bb1e3ef3ad04d622097d48835fcdad66845470b180ecdb77d0e27594f6d2f080
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 0.9998

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://krisoc.ru/pbw?utm_term=edith+torres+novoa PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4424376/normal_60b218802b751.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367916/normal_5fee2b62c9fec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387040/normal_60112855155fb.pdfIn PDF document text
    • https://gogozofoful.weebly.com/uploads/1/3/4/5/134512065/wifotejiwisoxux.pdfIn PDF document text
    • https://lepefolavexar.weebly.com/uploads/1/3/0/8/130874674/8244686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_6016c3ef07cc9.pdfIn PDF document text
    • https://munibejexa.weebly.com/uploads/1/3/1/4/131414516/6781560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371536/normal_600ebc1392494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459337/normal_601e6d63969ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pukagij.pbworks.com/w/file/fetch/144560601/13620870913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f650af5-cba8-4f65-9b77-8d249fbef48d/how_do_you_become_a_trustee_of_a_college.pdfIn PDF document text
    • http://fokopaviwu.pbworks.com/w/file/fetch/144462270/what_is_the_difference_between_maslow_and_erg_theory.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/f/exercices_maths_exponentielle_terminale_es.pdfIn PDF document text
    • http://jutifakukap.pbworks.com/f/42915956802.pdfIn PDF document text
    • http://gupiguna.pbworks.com/f/how_to_change_a_timex_watch_band.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8bf17c3-1b6f-4b94-a4e9-610c669f4add/59739948415.pdfIn PDF document text
    • http://nerobedevu.pbworks.com/f/napemorizuposow.pdfIn PDF document text
    • http://xuvabufoj.pbworks.com/f/how_much_does_a_chief_financial_officer_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4d90b1f-1c4e-4e97-b7e5-47dd1ed60db1/what_is_tylers_curriculum_development_model.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_off0000f15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15A 4900 bytes
SHA-256: 5c351bd3c4192638049ebf06987266602ad95ac209bfc7e715a542d3ac90fc1b
font_01_sfnt_off00010200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10200 12580 bytes
SHA-256: b83395fc9e367209832b314091a89cbdeadc0d59230eb6f0689d057f312630f4

Open this report in the interactive analyzer, or submit your own file for analysis.