Malicious PDF — malware analysis report

Static analysis result for SHA-256 e530f87a774d059a…

MALICIOUS

PDF

85.1 KB Created: 2021-03-29 06:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d5b3badeac78b13d4446012d789d108a SHA-1: 5685cd11f9486b1ec7111641f11d4079a3cf9726 SHA-256: e530f87a774d059a609f3220ba54c3315f709bbacd3134d925313c4ff1d0ee3e
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://fokemale.ru/award?keyword=manual+energias+renovables+pdf PDF link annotation
    • http://xasefosixojoloj.iblogger.org/lewidisupipovanom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455881/normal_603813ec7930d.pdfIn PDF document text
    • http://2220202.ru/planar_handbook_3.5_downloadevn6g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459180/normal_5ffbdd15a4d37.pdfIn PDF document text
    • http://samettemiz.xyz/famuwugenelomexurepuvumimq73b3.pdfIn PDF document text
    • http://sebevifa.getenjoyment.net/adjective_worksheet_grade_7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413235/normal_60084a2d7d802.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/bodyweight_exercise_routine.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/beowulf_free.pdfIn PDF document text
    • http://discovljzg.fun/democracy_index_2017h8pb4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gunexukod.epizy.com/98664713592.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/alternating_current_class_12_ncert_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/xigifitidifosebibepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/626c555d-6f56-4f5f-ae24-b30d78fcd642/ancillary_justice_io9_review.pdfIn PDF document text
    • http://zomudipanosu.epizy.com/budibepolonumedu.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/sawebuli.pdfIn PDF document text
    • http://mavuriwowul.myartsonline.com/best_annotator_ipad_pencil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a57cbf3-015d-4c75-a548-368c32d42cb8/zaxikuzipokamogokol.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF949 5416 bytes
SHA-256: f69930abec696ca59799fc085ddcd77d44c14c5d2a339dcd355bc7080ecce860
font_01_sfnt_off00010bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD7 10592 bytes
SHA-256: 38f02bf299b471d7871c16108e9560efbbd2aaa2a944d37bd332c305ce17e9b5
font_02_sfnt_off00013010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13010 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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