Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8652c32d33da5d…

MALICIOUS

PDF

79.5 KB Created: 2021-03-29 13:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8cd6a839b4849b7ee427f27843aa1d7b SHA-1: 1027210b95334a8faf617f44f38896ca5f1b1ea0 SHA-256: 1a8652c32d33da5ddfe7e9881a61aa5e70df366c44a316584b9e45a514a3219f
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 0.9991

Heuristics 5

  • 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 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://xezojetit.ru/wix?keyword=casmec+all+state+audition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477886/normal_6059c6bd70df8.pdfIn PDF document text
    • http://sudesisobibimit.22web.org/wujokadisexogizosoge.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470981/normal_603f9448d75b7.pdfIn PDF document text
    • http://jokidinavefo.22web.org/11997842019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409114/normal_6003685fdd287.pdfIn PDF document text
    • http://sellforce.ru/aidin_salih_gerek_tp5hmg2.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410975/normal_60251b8f069c1.pdfIn PDF document text
    • http://usesalle.xyz/tim_ferriss_bookshelftf74h.pdfIn PDF document text
    • http://vosojivaru.mypressonline.com/autocad_2020_basic_commands_list.pdfIn PDF document text
    • http://copyright-notice-ig.com/mepidokinojoxenorignl6z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450864/normal_603ff458943ef.pdfIn PDF document text
    • http://kubodir.22web.org/kiviwamebezuvokebuvipofa.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
    • http://sofibimibojas.myartsonline.com/zitivituw.pdfIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_a5bdd77575bc41aca381e8faa47d1b73.pdf?index=trueIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_4d9e577e36aa4614a89a5262cb84d5a3.pdf?index=trueIn PDF document text
    • https://ba739632-11db-41f7-a023-683a20e55d36.filesusr.com/ugd/99835b_e25786c02b6643cd9a738c3601dce570.pdf?index=trueIn PDF document text
    • http://kiwusumusi.rf.gd/vejisasasilukomod.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/acuerdos_de_paz_de_paris_1973.pdfIn PDF document text
    • http://kuwijiti.myartsonline.com/adulthood_is_a_myth.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/list_of_foreign_words_in_english.pdfIn PDF document text
    • http://tekubone.epizy.com/33596031474.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_off0000ee95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 4892 bytes
SHA-256: 8987aa4934260639ccdbd9850352a495040610a2cd4385ef5e7c25cb0397d5c7
font_01_sfnt_off0000ff23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF23 10420 bytes
SHA-256: 4f4aa161931887518cc2d88a5ee76763c2d613bb10b09f7fc23c4ddc0726c9a1
font_02_sfnt_off00012270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12270 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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