Malicious PDF — malware analysis report

Static analysis result for SHA-256 420402da13e01983…

MALICIOUS

PDF

76.9 KB Created: 2021-03-08 17:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c29a65c1c14b2aa9058c819827778baf SHA-1: 323c13eaa61f4cfd544d2220c3f7f983487f7986 SHA-256: 420402da13e019833f6288cdb62273375cdd84e2ec2d7ebde5cd6bcd0a3acc06
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 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://zajinet.ru/strik?utm_term=how+to+charge+tough+solar+watch PDF link annotation
    • http://lnstagramcopyrightservices.org/xutosepegov4axu1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451225/normal_5ffd655e31ec4.pdfIn PDF document text
    • http://hotita.space/6942563431231t17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368492/normal_60036e46a73e4.pdfIn PDF document text
    • http://site-shop.xyz/orange_ball_gown_wedding_dressmn3sy.pdfIn PDF document text
    • http://xijonofupawulo.mypressonline.com/58360576213.pdfIn PDF document text
    • http://dimopun.mywebcommunity.org/30960806397.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/fovezewi/what_star_is_brighter_than_the_sun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50b494c3-add6-4fec-8180-38145ee90433/tp-link_wr841n_tomato_firmware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f1ac44-408c-4f33-b062-2f493cae1974/adobe_premiere_pro_cost_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0812cb-1a14-4352-8d68-43633ed47d96/what_is_the_importance_or_contribution_of_quantitative_research_in_social_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcebe6f7-e01a-4b89-80e2-339e702a09c5/55527417621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c4114f-e2c2-4c6f-ae21-eef005325dc2/rasurufulageladojitobaxev.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/anormalidades_de_leucocitos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3508080a-96e3-40dc-beb1-d4d2e30f04a8/lijoki.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/57939756205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2739047-5bb3-4e18-8f03-09728299fdb4/arturia_minibrute_analog_synthesizer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be8bfd6-0cfc-401c-88f4-85fe86cfea38/construction_cost_guide_2019.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/how_far_away_is_voyager_1_and_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2dd97f7-00d4-40fe-be0e-bb974ca826d9/what_are_the_characteristics_of_a_novella.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/88268018746.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_off0000eec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC2 5116 bytes
SHA-256: 2316e65496b6f5eab171d41449dc5a9b4cc16148b7720a350293b526d16447b6
font_01_sfnt_off00010035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10035 11056 bytes
SHA-256: f72bb8850a60dcd50a43878534320631fda3b6bb340651ecce27908201c0afd9

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