Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd490159d267e701…

MALICIOUS

PDF

70.6 KB Created: 2021-04-16 04:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3d074aaec1953424ba8ff1e173342e88 SHA-1: 76d9158d83eb33a2f84e93d1fb5eb0c225d8ba59 SHA-256: dd490159d267e7016f69acc617e3ef662bb81f8d39074135639aa981f0ef206b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, suggesting a link farm designed to redirect users to malicious content. The presence of these characteristics indicates a phishing or social engineering attack aimed at content theft or malware distribution.

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/strik?utm_term=they+say+i+say+with+readings+4th+edition+pdf PDF link annotation
    • https://cdn.sqhk.co/dizukenepu/hhaii7W/the_war_of_gods_movie_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_60167f6265f0f.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/vgcihDo/pregnancy_week_by_week_calculator_ivf.pdfIn PDF document text
    • http://peguxukeziku.sportsontheweb.net/adolescent_health_care_a_practical_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475379/normal_6041753d6755b.pdfIn PDF document text
    • https://kasewipiliri.weebly.com/uploads/1/3/4/9/134901701/9838674.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/1729138211.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/atahualpa_yupanqui_partituras.pdfIn PDF document text
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/tavowatev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450870/normal_60216e772f699.pdfIn PDF document text
    • https://fizinizaboz.weebly.com/uploads/1/3/5/3/135304720/9a4c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455901/normal_5febd0016d39e.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/gfiijf1/74527267564.pdfIn PDF document text
    • http://mowogaw.mypressonline.com/pdf_splitter_download_free_full_version.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/5b63d2f0-a77b-46f2-8fce-aa0fb4b0cfc4/bridgeport_series_2_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e867fd05-5e7b-4191-8652-925a822cd448/how_to_link_my_laptop_to_a_projector.pdfIn PDF document text
    • http://wugetad.myartsonline.com/anomalia_magnetica_del_atlantico_sur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa605d69-5e66-49e2-be18-260af8231384/poemas_en_lenguas_indigenas_cortos_y_su_traduccion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/420d1dad-5bbe-4257-851c-3a440fd9c73b/33717511107.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_off0000d511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD511 5500 bytes
SHA-256: ab9957ebbd7204e67a1f4c6651a67a71c549dc5d9a5bc71ebeefbe6b953fbf86
font_01_sfnt_off0000e7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E5 10888 bytes
SHA-256: a6b5e101e99b79abbc6ba5baf08dd56ce85e181493a24155baa153d1f755dd3b

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