Malicious PDF — malware analysis report

Static analysis result for SHA-256 58b990bab2d94a78…

MALICIOUS

PDF

73.1 KB Created: 2021-03-28 18:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 07166296583804e7d560a2633ea769f1 SHA-1: 580b2342521e984ad121da27606348715d51d753 SHA-256: 58b990bab2d94a780bb9e8a798d44a884be94ab923ed3faf2883c4606c12b3eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF link farm heuristic suggests the document is designed to redirect users to external, potentially malicious websites, such as http://wupevijijoze.mygamesonline.org/wenikamikuserap.pdf. The embedded URL https://mezovuduw.ru/strik?utm_term=brother+xl+3750+bobbin further supports this, indicating a phishing or malware distribution attempt.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/strik?utm_term=brother+xl+3750+bobbin PDF link annotation
    • http://wupevijijoze.mygamesonline.org/wenikamikuserap.pdfIn PDF document text
    • https://bategasef.weebly.com/uploads/1/3/2/7/132712490/rurire_tonef_nawowotesa_sutunusima.pdfIn PDF document text
    • https://powumebaporisav.weebly.com/uploads/1/3/4/8/134891471/damejakolikavol.pdfIn PDF document text
    • http://wikowezenitezo.medianewsonline.com/automatic_control_theory.pdfIn PDF document text
    • https://cdn.sqhk.co/zebasama/cifMmmM/mefagakitoniguxevoju.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/MrbbUib/xokalemowakogob.pdfIn PDF document text
    • https://cdn.sqhk.co/susononuz/hgcVjfY/video_player_with_subtitles_download_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/gorigaserata/hdQ1Fhc/wefujutawimilasu.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/bf571716-324c-481e-8ca0-05c6df4a6c89/what_is_classical_conditioning_in_animals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54ba15fb-3570-4c98-9b83-cc3f1e1c5634/using_thinkorswim_with_robinhood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d4ce3e-feb3-4226-9914-471814b10232/ge_ultra_pro_universal_remote_codes_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa6d3dea-2b3d-4c1f-805c-dc7bcbfed02b/weight_watchers_food_scales_tesco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8586db4c-f421-4d45-8bc4-5f0fbddbdb2c/ionic_bonding_worksheet_answers_back.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4929ffcb-5f4d-4539-bd42-50f074b2931b/how_to_get_3_digit_voice_response_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/876a3f08-34f5-41fe-99b3-e777a2f76f72/votuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e5ae07-ead2-4074-b774-b207e5ee5298/91655218687.pdfIn PDF document text
    • http://tediguku.atwebpages.com/59245859729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e11349-3c0d-4bdc-b6a9-37779e0d5c6e/bozobubaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85fcd9d8-3977-438b-ab6c-5599730cd846/dell_inspiron_1501_operating_system_not_found.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2fb774-d457-468b-95a6-9e49ade01415/23652020439.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_off0000e27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27B 5152 bytes
SHA-256: 3fdfc0f468c97b189986683b50287a8a788812b055415c66a117af94a84585b2
font_01_sfnt_off0000f414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF414 10452 bytes
SHA-256: 0709117c45854f317ad61ddf725de5bb3c29d7082866fd9e026d276379f88e22