Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65228ce0250c21e…

MALICIOUS

PDF

72.5 KB Created: 2021-05-23 19:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8c8f3bfee239fd2d448b58de3ff2ba78 SHA-1: 71cf34dee30e97f53b9cc6afd122a9243ad01843 SHA-256: a65228ce0250c21e03e3d93732efe224ce9ee6554a2d09c4a1a5d533cb805dc0
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/strik?utm_term=stihl+028+av+super+chainsaw+review PDF link annotation
    • https://tumozoredupoki.weebly.com/uploads/1/3/0/9/130969837/dbfca45f9f9.pdfIn PDF document text
    • https://tugesarafexo.weebly.com/uploads/1/3/5/3/135319839/dajiwatul.pdfIn PDF document text
    • https://jazawimap.weebly.com/uploads/1/3/5/3/135346256/9273056.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/fatimoleboxud-mijofoxepixulok.pdfIn PDF document text
    • https://finukapaxareb.weebly.com/uploads/1/3/4/4/134494590/wuvato-dawifipilibebeg-pexoxa-zotelituponuxo.pdfIn PDF document text
    • https://powagexufofuw.weebly.com/uploads/1/3/4/7/134748875/1830431.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://s3.amazonaws.com/wuvepilamamuse/xoluvimafefoletegaj.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/luxovodowosixuvojel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9279982d-7b24-4ed3-bfae-a836618ad7f9/best_snowsuit_for_18_month_old.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcbe1d95-cfe1-4333-98c8-34de0664611d/why_my_hotspot_is_not_working_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ed666b7-b41b-4ddb-b485-6c6be9542156/jasoxarokogubaxaro.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/poxutewatesawizofezataze.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/cnn_online_feedback_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9c64711-384f-4289-8d7e-a4f473505c2e/what_is_the_silence_of_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ab39bfc-e33f-4ac3-8f93-b001cf02afba/gokulodisugijitewuzabe.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/82744051784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02787719-cd4e-4c52-8316-6e4ef2fc9f20/premiere_pro_effects_controls_not_showing.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/canon_angle_finder_b_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23d7780d-8e93-4ff0-a679-0b53a05dbf72/the_lion_and_the_mouse_fable_lesson.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/66155551053.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_off0000ccbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBC 5516 bytes
SHA-256: f62757af98500f5c702e7fe535197fa585117c094ee1616ad5c2a97626c2ab16
font_01_sfnt_off0000df83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF83 10876 bytes
SHA-256: 4f1f193664a4ecd4712d1065e958882148df6e32fd219f9f3026eb2899e66d93
font_02_sfnt_off000104ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AD 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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