Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5a0f41549920de…

MALICIOUS

PDF

70.6 KB Created: 2020-12-26 10:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 7888f032333d534a70015a46f9ae63e1 SHA-1: 169a600d3ee1102bc80edde717dc437dd454260e SHA-256: 9d5a0f41549920dedfeb85f54946a1a66dd786300a2c6611045ccea58584be5e
294 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://ggtraff.ru/wb?keyword=traffic%20rider%20game%20mod%20app%20download In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/da50c7e0ec8f483.pdfIn PDF document text
    • https://mawijazug.weebly.com/uploads/1/3/1/3/131380733/3ffddd0398af6.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/vojapuxuwux-tipamudufaw-miwojip.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/kizigufagotekijoj.pdfIn PDF document text
    • https://xorexataziz.weebly.com/uploads/1/3/4/4/134496469/vofutovipenivur.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/f317b676-14ef-4f3e-9ac7-b8ca5e474e9a/teenage_mutant_ninja_turtles_legends_cheat_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/php_curl_application_x-_www-_form-_urlencoded.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/15574227589.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/razer_login_data.pdfIn macro / runtime command snippet
    • https://uploads.strikinglycdn.com/files/01db5450-67d4-4524-8fe6-766fa8934374/4120110131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bab9ddf-f292-40d5-b1d5-10b5f3607284/vuposesakatur.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/kindergarten_rainbow_sight_words_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/towumafipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16e2af04-bb00-4230-a11e-f579cea0731e/81105240020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4d3f6b-73ff-4866-8478-52751c831641/42278885053.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_off0000d643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD643 5340 bytes
SHA-256: 7813da9c5965c78da9dbc60a3a4b21db147c4491011f2fc944736639262179ce
font_01_sfnt_off0000e86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86A 10828 bytes
SHA-256: 73d84c57100ee339e24849e2fa793926476b6efc399917ab9df15a43026dd6b9

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