Malicious PDF — malware analysis report

Static analysis result for SHA-256 e24d603cb14f58a0…

MALICIOUS

PDF

86.2 KB Created: 2021-04-05 15:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 135035a38ca96916af8a1efffc2b441d SHA-1: 6c09ec37bd9467c4b4a095aa346c91deffbd5a20 SHA-256: e24d603cb14f58a0ac065a66439b9875dd8598078387717163c8a869e8ea6d96
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The presence of numerous links suggests a link farm designed to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit users by directing them to malicious external sites.

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://baarspo.ru/award?keyword=modelo+atomico+de+bohr+pdf PDF link annotation
    • http://rafupofamurawaf.mygamesonline.org/pokemefizaguvitonejetebaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_60164f17d4b67.pdfIn PDF document text
    • https://cdn.sqhk.co/sunalikefazo/hiiyMuV/zombie_riot_csgo.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/jjaSF3k/gaperuzipugiwigifurase.pdfIn PDF document text
    • https://redutoxaxijarow.weebly.com/uploads/1/3/4/7/134760413/fca0a6bf65ad2cd.pdfIn PDF document text
    • http://jawazapefaxuzit.mywebcommunity.org/6487700744.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393644/normal_5fe3ab2ef206e.pdfIn PDF document text
    • http://laribij.scienceontheweb.net/55788807824.pdfIn PDF document text
    • https://fesunoxatufaf.weebly.com/uploads/1/3/4/5/134519878/mazoso.pdfIn PDF document text
    • http://taptopbot.com/printable_self_certification_form_nhsjtmmr.pdfIn PDF document text
    • https://cdn.sqhk.co/radofufalam/kcjdgdh/name_that_song_app.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/punuvijotabudot.pdfIn PDF document text
    • https://wizawexixif.weebly.com/uploads/1/3/4/4/134472694/robuzem-futetefinijez-fojufazi.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/UidhiHd/rugaza.pdfIn PDF document text
    • http://hackins.site/bojobeloxesageliradiminenuq5gl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426813/normal_60058182e6b28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473041/normal_60315c180654b.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/269c2920-045b-46ec-8cc3-968813cd8c89/merciless_indian_savages_hoodie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e4a498-a2fa-494f-8f08-4f2e5210a5b4/49374753560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/737d5c75-a190-4a00-91a8-b8fbbb525b61/apollo_twin_solo_usb_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/509f0d66-2e25-4c6b-87ec-ff943a985c30/epson_xp_200_manual_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/831f1c2f-7c1a-4eca-8b80-9a584f8c3c03/funes_el_memorioso_borges.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_off0000f7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D9 5364 bytes
SHA-256: f8ad9412a6620bf8a601296720936a210aa42a1f1b167a29cdb70a8722a337ea
font_01_sfnt_off000109f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F3 12888 bytes
SHA-256: d2179e41b64a1170339f9713a9a1de21ea76a035b03973a37c6e1ebe8978640c
font_02_sfnt_off00013473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13473 16140 bytes
SHA-256: c2a1a04313bd84b17a30ad113e2f6f997430d06c5ca81a962c68377b953df5ab