Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd2298fbf52f9ed…

MALICIOUS

PDF

99.4 KB Created: 2021-04-01 20:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 05887cb510ce869f0159c4fb45f6012b SHA-1: 529e73990a674c8eeb7c7a573feb13ba884c3a35 SHA-256: acd2298fbf52f9ed1d12861b5d1d7299e02bc5613a46c9379b543da557166e92
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with one specifically flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of numerous external links points towards an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/award?keyword=agency+problems+and+residual+claims+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460682/normal_600039a2ca80f.pdfIn PDF document text
    • http://gakivako.iblogger.org/the_cost_of_discipleship_bonhoeffer.pdfIn PDF document text
    • http://bet-info.ru/smile_raina_telgemeier_pagesaern3.pdfIn PDF document text
    • http://seamanygau.best/typewriter_repair_austin_texasvyi8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_6009db4d47bf8.pdfIn PDF document text
    • http://phrensy.co/39723344667ug1ut.pdfIn PDF document text
    • http://presente-top.store/robejufatapiroma328ar.pdfIn PDF document text
    • http://galosidijixiwu.mypressonline.com/61564899161.pdfIn PDF document text
    • http://smotrikino.fun/kuramomgtdp.pdfIn PDF document text
    • http://majikok.mygamesonline.org/bivod.pdfIn PDF document text
    • http://suzamakulamuj.mypressonline.com/alcools_apollinaire_gratuit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wodowepakimeko.onlinewebshop.net/lugetupiwomifo.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/guidewire_policy_center_testing_jobs.pdfIn PDF document text
    • http://vajapojaperusu.myartsonline.com/28545996592.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/89399127826.pdfIn PDF document text
    • http://zoxokukazo.epizy.com/accidental_hero_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/83121915781.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_off0001484a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1484A 5708 bytes
SHA-256: b8255e6504304d72698273a1e0f54a48263ebb83835e9adf333a432ce54da00b
font_01_sfnt_off00015ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BA9 10784 bytes
SHA-256: d7b2aa845c679708351306a943b9cc5754c797b8c005a8944550c98925bf9ad2

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