Malicious PDF — malware analysis report

Static analysis result for SHA-256 71a1e87b55914a3c…

MALICIOUS

PDF

80.2 KB Created: 2021-03-26 15:24:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8503574d7e7e68afc3244c99b2e76617 SHA-1: 92c0dddcb5255f331b6c6e4a647331bff351ac60 SHA-256: 71a1e87b55914a3c7977f3c4109bd03952a370f7eae5f4d3b89a3b0365374141
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 0.9997

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://druttle.ru/123?utm_term=game+among+the+sleep+full+version PDF link annotation
    • https://zodaribidibukez.weebly.com/uploads/1/3/4/7/134716266/gagubutolusuro.pdfIn PDF document text
    • https://jetisinodab.weebly.com/uploads/1/3/5/3/135335938/vinivaz-sazenexit-kigow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368488/normal_5feb0ca82f9c5.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/jf1y9gf/grotto_canyon_hike_trail_report.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/j0gjiCx/nigerian_gospel_music_worship_songs_vol_2.pdfIn PDF document text
    • http://vivubowi.getenjoyment.net/95954844774.pdfIn PDF document text
    • http://vuforir.iblogger.org/demand_planning_template_in_excel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449603/normal_600fb53b0cb10.pdfIn PDF document text
    • http://wefinexof.iblogger.org/vurisalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372972/normal_602ed0d2541b2.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/FsYriib/xabidejimiloxavawufe.pdfIn PDF document text
    • https://cdn.sqhk.co/zodunoxurob/d3zUigJ/3657999585.pdfIn PDF document text
    • http://kopalirigel.mypressonline.com/wubitizi.pdfIn PDF document text
    • https://motedozanegiraz.weebly.com/uploads/1/3/1/3/131383309/fiserutonikuwigofefa.pdfIn PDF document text
    • https://cdn.sqhk.co/pemofirojez/SihTggC/89907293428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477138/normal_5fd87d4a94002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_605553b5c9bf9.pdfIn PDF document text
    • https://sitadubudotewor.weebly.com/uploads/1/3/5/3/135335426/617840.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zogosugo.onlinewebshop.net/lunekawisofuxixamaxafari.pdfIn PDF document text
    • http://zipazakixodi.rf.gd/spice_and_wolf_season_2_episode_0.pdfIn PDF document text
    • http://pezexer.rf.gd/64860725845.pdfIn PDF document text
    • http://lifobem.myartsonline.com/biological_width.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_off0000fb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8A 5408 bytes
SHA-256: 2c001929f21ac7e3aec7665500a3bf9b44b4d4df7e258301f1e7cbeb69dad1cc
font_01_sfnt_off00010dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD2 11156 bytes
SHA-256: e0504f5ed21e8eaac46403f5c2cb5557cce1d364dc7da408f108660df56fb6a0

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