Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7944d45b0ae353…

MALICIOUS

PDF

79.5 KB Created: 2021-02-21 18:14:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 6e81986e1a9068549e9601b9ca9c3245 SHA-1: 5c0840c650365d9a8b7bb47cf7f927ea88076b04 SHA-256: fa7944d45b0ae353581aaa4b12104101749c50ccea025d4ac61d4a2dc11462c5
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying a malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of many external links suggests a link farm or phishing attempt to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=elite+air+fryer In PDF document text
    • http://meetly.space/the_beatles_anthology_dvde4ag4.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/YEoghGY/cake_recipes_for_dogs.pdfIn PDF document text
    • http://yeswins.space/samemeganavusevofopwiuvw.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/gcgh5ja/kedup.pdfIn PDF document text
    • http://dwatches.site/11528341466r13j6.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/huggies_overnight_size_guidevhuv3.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/9cYS3hg/mazava.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/rVDjdie/dino_run_offline_night.pdfIn PDF document text
    • https://zepudelewow.weebly.com/uploads/1/3/2/6/132682561/bisasofigoruzo_futofib_lumomusevujo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nawevuf.epizy.com/sikowewosukipajufenefero.pdfIn PDF document text
    • http://vamagirizotaro.rf.gd/in_the_mood_for_love_poster_etsy.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/74290348032.pdfIn PDF document text
    • http://bejopirobi.epizy.com/cisco_3750_series_switch_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/zovarixelenira.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/wemuzazezilagutaxezun.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/21887966607.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/62859303665.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/never_going_back_again_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/microsoft_access_computer_inventory_template.pdfIn PDF document text
    • http://gajopem.epizy.com/pugafap.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/quantitative_research_examples_about_business.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_off0000f96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96D 4640 bytes
SHA-256: 351b7a05fc38ac8e99c7cb7fb6fa4c28c8e23b27ba5c55c81623fc2a6bf09a77
font_01_sfnt_off00010955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10955 11680 bytes
SHA-256: 93bc4fc61cc7e3fa7c4307a8b40de1a8bd3cb0501c79b925aa6f1e5c56d8f0be

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