Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49dbef600d022b0…

MALICIOUS

PDF

73.1 KB Created: 2020-12-24 06:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 69a9bd9b8f3178cf481c3b7e11cea249 SHA-1: 1d22a42e69f2ad2bc3ec61c9d082bf57e919a4be SHA-256: a49dbef600d022b071c8dd1ce0ecb8da59396bb63d7542f95ccde2befa407306
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 0.9998

Heuristics 6

  • 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.
  • 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://trafficel.ru/123?utm_term=austin+auto+brokers+llc PDF link annotation
    • https://natesikapepik.weebly.com/uploads/1/3/4/7/134750077/valux.pdfIn PDF document text
    • https://vemewibikem.weebly.com/uploads/1/3/0/7/130776349/dagerituwuz.pdfIn PDF document text
    • https://jeralizijofuki.weebly.com/uploads/1/3/4/7/134710598/solaweruvitizag_julezisamoduga_dotawadozaxetow.pdfIn PDF document text
    • https://nopubekekav.weebly.com/uploads/1/3/4/5/134511336/d4d6d556609c95.pdfIn PDF document text
    • https://sexitikimuzulab.weebly.com/uploads/1/3/5/2/135296232/nokin.pdfIn PDF document text
    • https://cdn.sqhk.co/forokuxodel/jhPghhf/iphone_camera_for_android_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xiteduva/RWrYDZg/screen_recorder_no_watermark_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kupemopo/fjbhijj/guess_the_movie_emoji_quiz_diva_answers.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/2b80a9.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/Egjjfhb/53416654475.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f8ced470a661.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://uploads.strikinglycdn.com/files/76930fb4-6260-4637-8025-9fe5255d5ebb/plato27_s_tripartite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c484933-9295-4210-853c-f67d9d70e2fb/35772014904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3d70ff-ef4a-46b6-9951-ed1a31d733bb/konakip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/471f4314-d5fa-41df-8daf-913a07db9c02/51876601255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88014001-656d-40c7-91f7-737cf602f5fe/potenciadores_de_sabor.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_off0000d394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD394 4868 bytes
SHA-256: 23f8e419c06fa3f8064ba54f6e4480d016a71340bba793999658ec22d304cbc8
font_01_sfnt_off0000e427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE427 11180 bytes
SHA-256: 843959fada78da5ab663c9832ab81bab5b386b240d686022f2fe9283ac134239
font_02_sfnt_off000109c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.