Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc76b117e2ae4b0…

MALICIOUS

PDF

97.0 KB Created: 2021-05-16 18:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 32e7489e26eed27cd57972e62c2028d3 SHA-1: 10eeb09654286836637c53c0e54f21c43b2f1903 SHA-256: 0fc76b117e2ae4b0ca53836ad89739505b4cd166b9b1bf43d3539211b881e49a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to disposable domains, with one specifically masquerading as a 'Wall Street Journal sign in' page. This strongly suggests a phishing or credential harvesting attempt. The ML classifier and ClamAV detection further confirm its malicious nature, likely serving as a dropper or redirector to malicious content.

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://jumiwimov.ru/strik?utm_term=wall+street+journal+sign+in PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446016/normal_60386b808b205.pdfIn PDF document text
    • https://referozudu.weebly.com/uploads/1/3/0/7/130775612/nixeguwetonawomiwole.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377663/normal_5ffa22b750c1e.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/62666075405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418001/normal_603bf5723396f.pdfIn PDF document text
    • http://lakujalinifibo.mypressonline.com/28207439841.pdfIn PDF document text
    • https://kaxebovirufuj.weebly.com/uploads/1/3/4/3/134399635/pagisagarape-ronaronoxizudeg-pezonedumite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417226/normal_606d128f7e101.pdfIn PDF document text
    • https://tukitesajore.weebly.com/uploads/1/3/4/8/134891371/sipasupit-sonoreluv-vetopapagi-sofikibafoj.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/lefib.pdfIn PDF document text
    • http://tokiridevifo.medianewsonline.com/amoeba_sisters_video_recap_ecological_succession_answers.pdfIn PDF document text
    • http://xenakasewexibal.sportsontheweb.net/barbershop_quartet_sheet_music.pdfIn PDF document text
    • https://pifujikis.weebly.com/uploads/1/3/4/8/134875168/nunisavemamiwazem.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/6aea2d74-a8aa-439e-960b-09dee0d77567/al_quran_with_bangla_translation_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffc270ae-ebd3-4d9e-b3fd-8446e5640a2a/80703127007.pdfIn PDF document text
    • http://fozusiraviwip.epizy.com/muvetezaxonivuvebikalif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c9da8f-430b-48d7-9f81-945e31847902/limatovul.pdfIn PDF document text
    • http://xapimiwosusuv.epizy.com/d-link_dir-615_login_problem.pdfIn PDF document text
    • http://miwefonozez.epizy.com/associated_gas_reinjection_act.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c711183-e0cc-4b78-8e3f-67f7daaf112c/35568250916.pdfIn PDF document text
    • http://puzekuzabi.epizy.com/manual_de_capelania_hospitalar.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_off00013f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F2A 4944 bytes
SHA-256: da6efb0e0ba3d4f8f83b866c91b61db2a1f8c92903aff4d6cc91fce747ae5c98
font_01_sfnt_off0001501b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1501B 11448 bytes
SHA-256: 3ff4d25ebdfd0bfb76dd2d0e6f968a6e216d6d78716e03a89ccc3c639fda8e13

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