Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45245154adc6040…

MALICIOUS

PDF

120.9 KB Created: 2021-03-11 18:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 48242184c1bd5e54c9bb1f8f14820835 SHA-1: 59a7701de68e3493394608b9dfc2635c25e06b2d SHA-256: b45245154adc604054549eec08a43377c6e35bbce64194ddab02c270b019ea81
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 0.9995

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://kuzutuzo.ru/wix?keyword=pathfinder+monk+of+the+iron+mountain PDF link annotation
    • http://milanomodaitaly.site/chuck_feeney_contact_information1wkbo.pdfIn PDF document text
    • https://vasuwogi.weebly.com/uploads/1/3/4/0/134017955/zivedopiku-navilidupokaxej-kiposisiwus.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/SZDsjhy/move_to_sd_card_apk_uptodown.pdfIn PDF document text
    • https://tofibuji.weebly.com/uploads/1/3/5/3/135309424/9777014.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/WljK0je/10369721956.pdfIn PDF document text
    • https://cdn.sqhk.co/saligoliti/Gidhlif/89257185579.pdfIn PDF document text
    • https://rulotukipaka.weebly.com/uploads/1/3/0/7/130776525/9595226.pdfIn PDF document text
    • http://golden-bridge.pro/29136685582wfxqy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gowasofejav.rf.gd/betitojomukuluf.pdfIn PDF document text
    • http://zepotusetazokor.rf.gd/answer_legal_definition.pdfIn PDF document text
    • http://rezazaje.epizy.com/chal_chaiya_chaiya_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37cc8c1e-9466-45d0-881a-4c378aea5d65/sisojuxukatifulebuju.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/google_sheets_for_macbook.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/10057140120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2054a45f-e4f3-4ab0-a0b5-31a5b4f37366/hitchhikers_guide_to_the_galaxy_quotes_dolphins.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/54638495891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5de098fe-f3bf-4927-91b2-5e661f2dac33/palewivofatitizagusika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce3a71a-94b0-41d7-bfc7-715c65d1aa85/jennifer_morales_kennesaw_state.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/72468110741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e933ea3e-5b5a-496f-94c6-8a667c8b5535/4958150900.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/xaxutuzijudexovofuma.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19312 4884 bytes
SHA-256: f30e4f8c9b3b14e66d079201f05ff994bfb9293267efc5a24776b6e73aba8b47
font_01_sfnt_off0001a375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A375 10472 bytes
SHA-256: cbce50968bcfff06edacd02f3c0559bdf0900ad4c2355d43d236f4e0abfecaf7
font_02_sfnt_off0001c74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C74B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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