Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1edfcf90cb9bbd9…

MALICIOUS

PDF

75.4 KB Created: 2021-06-13 23:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ffd9d049a0961d0035672ee18b04887a SHA-1: cbb35cfa8748c62655cc525762ff71f16f879962 SHA-256: c1edfcf90cb9bbd96688aab397745bbb8e5fead4d8efc7ac392591d7f26acbef
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with at least 30 distinct links detected. The presence of a 'utm_term' parameter in one of the URLs suggests potential tracking or phishing activities. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://garglob.ru/pbw?utm_term=how+to+put+a+hook+on+a+fishing+rod+stardew+valley PDF link annotation
    • https://tumotasefon.weebly.com/uploads/1/3/5/3/135317172/jilubuwigi.pdfIn PDF document text
    • https://getomipo.weebly.com/uploads/1/3/4/4/134403721/daf46.pdfIn PDF document text
    • https://tijezelaxupoki.weebly.com/uploads/1/3/5/3/135340387/7610753.pdfIn PDF document text
    • https://gogidexiveje.weebly.com/uploads/1/3/4/7/134762038/ebe56e4819ef3.pdfIn PDF document text
    • https://wijinopupog.weebly.com/uploads/1/3/5/3/135323990/tuvefonubepuje-xogitip.pdfIn PDF document text
    • https://fimetopim.weebly.com/uploads/1/3/4/3/134399480/tularalufulemodimak.pdfIn PDF document text
    • https://rigugoxa.weebly.com/uploads/1/3/0/7/130776225/05b6aca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483604/normal_60bb81261d4ce.pdfIn PDF document text
    • https://dalowosa.weebly.com/uploads/1/3/4/3/134383453/zamebefupovaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421205/normal_6017549a04af3.pdfIn PDF document text
    • https://runogobikekeg.weebly.com/uploads/1/3/5/3/135350887/128638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453734/normal_60359902f1858.pdfIn PDF document text
    • https://debozolajaxagaf.weebly.com/uploads/1/3/1/0/131070846/338448.pdfIn PDF document text
    • https://gibodogud.weebly.com/uploads/1/3/5/9/135994226/movadu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a822b8f7-5163-451c-91a8-01f1c48538d8/a_que_se_debe_el_dolor_de_huesos_en_los_pies.pdfIn PDF document text
    • http://kigemulu.pbworks.com/w/file/fetch/144784230/how_to_summon_an_angel_wikihow.pdfIn PDF document text
    • http://vazesuna.pbworks.com/f/ubqari_magazine_april_2020_download.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/w/file/fetch/144529710/29402593651.pdfIn PDF document text
    • http://zivovot.pbworks.com/f/93937151787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a96209ab-2acb-45a0-9e97-c798a4a7b3e3/xopogo.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_off0000e8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A7 5580 bytes
SHA-256: b2984865dc9fed553661c056c696f8ba06da003194b176fd418a57e671571370
font_01_sfnt_off0000fbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBB 10652 bytes
SHA-256: 851b9d707815fe2a55fd0472f7085c02e04d8e9321fd3b5a9a321bf22f8a5e50

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