Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a74f6c0cb23728…

MALICIOUS

PDF

91.0 KB Created: 2021-03-20 12:25:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 20e4ba5734186d6f9aa356a94607bdfe SHA-1: 9b25dfea281b1dac96c1e753d9b86b12b2d2e98b SHA-256: d4a74f6c0cb237283afdf1415f8318713627f788faa6984cf24d1d88dfc5381d
134 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of a 'download button' heuristic further supports the lure of downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/award?keyword=convert+pdf+to+word+without+adobe+pro PDF link annotation
    • http://jetiloxabutu.iblogger.org/android_tv_box_uk_2019.pdfIn PDF document text
    • http://yoganchik.space/dolibozobifugupokamufefj8ch.pdfIn PDF document text
    • https://xumulevaz.weebly.com/uploads/1/3/5/3/135348617/9093198.pdfIn PDF document text
    • http://peteferix.mypressonline.com/stakeholder_analysis_example.pdfIn PDF document text
    • http://biniwitovo.mywebcommunity.org/qaseeda_burda_shareef_download.pdfIn PDF document text
    • http://thedopemarketing.com/zojuzosafa9.pdfIn PDF document text
    • https://lipixikipated.weebly.com/uploads/1/3/0/7/130776445/fevubunimes.pdfIn PDF document text
    • http://veviwumifuvemuz.mypressonline.com/ocr_a_level_chemistry_specimen_paper_2.pdfIn PDF document text
    • http://mizejodaf.mywebcommunity.org/47525347843.pdfIn PDF document text
    • https://gokepitamewema.weebly.com/uploads/1/3/5/3/135325242/eeb2c7b07a79.pdfIn PDF document text
    • https://xukejexen.weebly.com/uploads/1/3/4/4/134480318/7041693.pdfIn PDF document text
    • https://pugufatafa.weebly.com/uploads/1/3/5/9/135967981/kixobigiwikototolesu.pdfIn PDF document text
    • http://faceit.su/macbeth_act_2_questions_and_answersxpc8y.pdfIn PDF document text
    • http://fsbsiod.com/25755022242n93ll.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7edff01f-3aae-4073-ac09-0f837d880078/76455309828.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/dikuwokes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5164816-c1d3-4718-a891-4387d3eaf86a/technical_vs_fundamental_analysis_ppt.pdfIn PDF document text
    • http://fogaweja.epizy.com/cfr_21_part_110.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/71570388716.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/vetupejukugozugopevadusim.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/inventory_template_access_free.pdfIn PDF document text
    • http://dudolisimak.epizy.com/zumisirutirixifupabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c6880cd-cb7a-4df9-a816-abdafab266ea/camp_chef_smokepro_deluxe_pellet_grill_and_smoker_reviews.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7F 5116 bytes
SHA-256: b001d11fef9927da646bec77a46e90e85f059895b1b8c092be8321f09c7156c3
font_01_sfnt_off00012bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEF 10692 bytes
SHA-256: 2a23092fc45f83319bda777631baf3fd6b784eb75a342d6e5a340a057f5a7f7e
font_02_sfnt_off0001509d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1509D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176