Malicious PDF — malware analysis report

Static analysis result for SHA-256 742dd513be983429…

MALICIOUS

PDF

75.2 KB Created: 2021-03-15 11:00:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0253f74b45d7304af81c080fcd0ebe7c SHA-1: 92f6684140b40a027d34cf282df9d8efb457fc3d SHA-256: 742dd513be983429cb107668dce8b72ed653d7fb94d49aa1d783db42a61ebccf
186 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 0.9999

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/strik?utm_term=romeo+and+juliet+movie+free+1968 PDF link annotation
    • http://instacopyrighthelpteam.com/bowie_knife_templatehrs9c.pdfIn PDF document text
    • http://dresdenpharma.ru/hp_elitebook_8570p_notebook_pc_energy_star_specs3fpb9.pdfIn PDF document text
    • http://lbaranaydin.com/wejejuvewuxinuniwerozexazeex.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/50028285160.pdfIn PDF document text
    • http://damvglaz0.xyz/sedupukopewatuxfrbnl.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/c63f07ff-a71b-4539-b2e9-6a644acb2dbf/sister_outsider_audre_lorde_vk.pdfIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_d5083e1797854f3d99f931e2acb6459c.pdf?index=trueIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_573c15e08e2f42a9a81ee38811b8196f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ba17ba3-7ae7-453d-82f6-78db229cc067/jatixebufupibefiwivuborul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de54eb14-69b6-417a-8698-b12081484040/80758209085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f8cfe77-2403-4b3a-8a78-90bb33fb3596/big_jambox_charger_port.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b9b7ab6-e7dd-4c9a-afbd-3e08a5a4c176/99593963200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24c749ff-926d-4c9d-99ee-b764c73f02ba/15912035833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28171de5-4abf-49ec-88c5-127bb74acdc0/54044351751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5bc0e73-129e-4cc7-99eb-c47904c3b2c0/nespresso_lattissima_touch_buttons_guide.pdfIn PDF document text
    • https://0443db59-9f9d-4031-b786-8a5723798135.filesusr.com/ugd/ab62d6_758810b78d994cf18eb22ebc949da16f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eed8ad0-e12b-40bf-b07a-5996336267c3/after_the_fact_the_art_of_historical_detection_sparknotes.pdfIn PDF document text
    • http://telifujovemevo.atwebpages.com/jomonus.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_off0000e831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE831 5576 bytes
SHA-256: 9f57662f217a3c4e21c56ed868190ed17ae157b065f1fa4f45a79ba499e2fb85
font_01_sfnt_off0000fb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB21 10968 bytes
SHA-256: 98280c8ff5ce273d0b6856019c46dfbbdd9d03166b8b213c349b4a5c3e6a3030

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