Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf84b476d0f566f…

MALICIOUS

PDF

86.6 KB Created: 2021-02-28 16:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 019a72abbfe9a12c5389353f694105b2 SHA-1: 9f710172b70ff1fef21e0623bc8ce58697fd1217 SHA-256: 9cf84b476d0f566fc587bbf8352c44374426df6d3047392a4c7b83d6c52b38c2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to obscure malicious destinations. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to potentially harmful content.

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://pelibifir.ru/award?keyword=echo+weed+eater+srm+2100+parts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383165/normal_5fcf36327c8ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_602302234e356.pdfIn PDF document text
    • http://strongcreditscore.info/zombie_catchers_apk_hackedajeoe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368487/normal_5fdd4210bef70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380393/normal_5fd0637c795c0.pdfIn PDF document text
    • http://basiditdcf.space/muritorolukisobajiduxidaz9srip.pdfIn PDF document text
    • http://instapriz365.site/siwijemakagopinomat75e4.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/83998891056.pdfIn PDF document text
    • http://lujovotoloxes.iblogger.org/miwufixam.pdfIn PDF document text
    • http://healthit.space/85270897198bbane.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/wuzepepeba.pdfIn PDF document text
    • http://wawepeb.22web.org/will_nespresso_use_k_cups.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464863/normal_5fcd9eb147b55.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/togobujotefovupuvaket.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/bachs_cello_suite_no._1_movie_soundtrack.pdfIn PDF document text
    • http://zesisoxesevi.22web.org/61783336308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458633/normal_6013800f3193e.pdfIn PDF document text
    • http://zevixoleg.iblogger.org/antenna_tv_adults_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403673/normal_60052598ddb92.pdfIn PDF document text
    • http://effektzhizni.ru/exerccios_8_ano_pas_nao_terrgzzdd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuluwajewugutik.onlinewebshop.net/witcher_timeline_books_vs_games.pdfIn PDF document text
    • http://puteruwegadijem.epizy.com/firebugopuloperaketej.pdfIn PDF document text
    • http://jepisaf.epizy.com/we_are_the_chosen_generation_song.pdfIn PDF document text
    • http://lugaxelike.rf.gd/anari_number_1_songs.pdfIn PDF document text
    • http://jedabotuz.epizy.com/fezazenibedigegedisulukij.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_off00010541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10541 5656 bytes
SHA-256: ad864b5458e850ccac3489445469581cfeffd4cc915e0888292038a9b2097931
font_01_sfnt_off00011872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11872 16336 bytes
SHA-256: 5d7c7c35fa577f37257e50ea2868da5cc8c2c1db22729a4965d730900819afea

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