Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f497435177ab294…

MALICIOUS

PDF

78.3 KB Created: 2021-05-25 03:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1b4849a3fce2efa111a8c9b262af8a89 SHA-1: 3776efa46ea19779238ba2fb4b70363ef55a43f4 SHA-256: 7f497435177ab2946cf1648eefd5179ea1fe398f3f588eb249c104709f1d8350
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://dafemum.ru/strik?utm_term=film+fifty+shades+grey+full+movie+sub+indo+2018 PDF link annotation
    • https://jenisevemib.weebly.com/uploads/1/3/1/0/131070602/9895335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380379/normal_60434c8cc7ae4.pdfIn PDF document text
    • https://seniwotod.weebly.com/uploads/1/3/5/3/135346371/2f9ec77536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393514/normal_5fd37a6d83a4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454164/normal_604a8f6c9d9d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/noxelug.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/are_pdp_xbox_one_controllers_good.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/zomadugofuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/85338555244.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/brush_script_bt_font_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/652cade4-adc2-4b8a-8ada-8fe511022f59/stanley_garage_door_remote_control.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/bemifagikesosele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6916631-e6b0-4c3b-a6ee-93eeac9102f3/precio_del_libro_curso_de_milagros.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/easl_guidelines_for_alcoholic_liver_disease.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/ielts_test_8_listening_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/69601916790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8efbfc3a-4616-4221-b1dd-adb68ade8e26/kupuziv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61d955f2-a488-403c-9d57-e7572f8edfa2/what_is_meant_by_payment_due_date.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/award_ceremony_invitation_template_free_word.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/81844199232.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE079 6100 bytes
SHA-256: 5f217ebea259a786a2d548ce84bf83dbc6677823d1f88648f2f411703347ca8a
font_01_sfnt_off0000f523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF523 9800 bytes
SHA-256: 4716f81c2b85347c2aa0f468d5c6303a69bde857aa64df0c65314f15ffb8ccf8
font_02_sfnt_off000116c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C7 16076 bytes
SHA-256: df8916dc0488248139c8b7f8575cdad52201066875df9eb3f38f8be7ce625b0f

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