Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad8bf1b7ab5ce041…

MALICIOUS

PDF

74.8 KB Created: 2021-03-27 18:41:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fe76cf6f80daccf444fea6de3c9f1487 SHA-1: bc7b5ab02686ca85a4de334fa393e022eb2dc442 SHA-256: ad8bf1b7ab5ce0416f068942f7516049e4f50ae8b09648b540448a1d04577e98
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://dafemum.ru/123?utm_term=declan+mckenna+brazil+piano+sheet+music PDF link annotation
    • https://jezipupokegem.weebly.com/uploads/1/3/4/0/134042816/b4156baca202c.pdfIn PDF document text
    • https://bevubulik.weebly.com/uploads/1/3/2/6/132680874/535af9.pdfIn PDF document text
    • http://henrysavbr.site/choco_cooky_font_apk_filej8o5o.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/hiifhU4/football_training_equipment_for_kids.pdfIn PDF document text
    • http://dutagogijifu.iblogger.org/98221318078.pdfIn PDF document text
    • http://evatopshop.xyz/makoma52feo.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/8091430.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/vavimesakup1qcr4.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/Sjijehc/zusuwidaboja.pdfIn PDF document text
    • https://cdn.sqhk.co/kujotukil/4nsjjgj/kadomurope.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/jaerhiW/pidabejukexegumejomap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375353/normal_6040e3e469bda.pdfIn PDF document text
    • http://politach.com/piregafupedexa0equ8.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/if1cjbe/56673368169.pdfIn PDF document text
    • https://muvanuxeb.weebly.com/uploads/1/3/4/0/134096654/mewuvewu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391898/normal_5fc9c84db23d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451045/normal_5fc7e02e39de0.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/d7f011c1-5ba5-46d2-aec1-e7391e8836a1/honeywell_th8110r1008_factory_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a466ed-e3b2-4db6-b2dd-83c4d0eaff51/fundamentals_of_digital_logic_and_microcomputer_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7bd191d-90c6-48b9-aa67-cc16d00383fe/lajugavazadil.pdfIn PDF document text
    • http://dufowuburaji.rf.gd/how_to_use_rca_portable_dvd_player.pdfIn PDF document text
    • http://kolosavozogu.rf.gd/aspire_5738g_manual.pdfIn PDF document text
    • http://fujeximadotut.rf.gd/google_sheets_dynamic_drop_down_list.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_off0000e384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE384 5424 bytes
SHA-256: 425f7ce8214a06caad754331e4d96f0d9e86a096d7fede7ba50503094d9feaaf
font_01_sfnt_off0000f5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D7 11656 bytes
SHA-256: 3a075414f47cc8a0145be556988ee08d490d6d0b8fcab73c84b7397606efe3ca

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