Malicious PDF — malware analysis report

Static analysis result for SHA-256 30dbe8e5dbd60c7e…

MALICIOUS

PDF

75.4 KB Created: 2021-03-02 17:22:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 00f8587aa62fb4763e376c28f10044f9 SHA-1: 6f059ba42f5bfe44ee70d2662959d7f26eb9fd0a SHA-256: 30dbe8e5dbd60c7ea0cd538bad2d4810ed4ee8fc12f8edd5d735d564931f49f0
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical detection for a link farm and a high ML score for maliciousness. The embedded URLs and the PDF structure suggest an attempt to manipulate search engine results or redirect users to malicious content. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used for malicious redirection or exploitation.

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 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://jacksth.ru/strik?utm_term=what+is+the+storyline+of+the+notebook PDF link annotation
    • https://lifovidas.weebly.com/uploads/1/3/1/8/131856672/954287.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/jj9hfgh/digitech_jamman_stereo_looper_delay.pdfIn PDF document text
    • http://localdesign.me/adventure_of_lifetime_video_songfrdb7.pdfIn PDF document text
    • http://streamsweets.com/zajulab9dc3u.pdfIn PDF document text
    • https://nikovazof.weebly.com/uploads/1/3/2/6/132682709/wugowegazagidaj.pdfIn PDF document text
    • http://vijasoga.22web.org/59773671794.pdfIn PDF document text
    • http://jowopejev.22web.org/brute_force_attack_for_android.pdfIn PDF document text
    • http://gojifoxedot.iblogger.org/can_infant_optics_baby_monitor_be_hacked.pdfIn PDF document text
    • http://hh666o.site/bogopemazrx3tf.pdfIn PDF document text
    • https://juxilejaguzu.weebly.com/uploads/1/3/4/4/134404551/mapuxinov_nulozi_bexiwo.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/daKUIhd/77769606899.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gizapofosiwi.epizy.com/25621755492.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/lagu_whistle_blackpink_acoustic.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/activex_control_pad_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/44749517214.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/ayat_ruqyah_mandiri.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/abrahaminte_santhathikal_ring_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/autodesk_student_showcase.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_off0000ea45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA45 5172 bytes
SHA-256: 8c37c98218952c02afa7b3954ddca4161f9f7bb29949c4dcc45583c25cc32eb3
font_01_sfnt_off0000fbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEE 10712 bytes
SHA-256: fc1c7599db29bae26d420cc9b3750e575a40ab62ebf33e910fd94a6876325cee

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