Malicious PDF — malware analysis report

Static analysis result for SHA-256 adebbac8e2243daf…

MALICIOUS

PDF

78.9 KB Created: 2021-03-23 21:03:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b75852dcb32845eda619e9916d28fbcd SHA-1: 93c389ac169332f66d4715357a8f8c409f5880eb SHA-256: adebbac8e2243daf845851ce663682664c2361c9b2a45120a7935f5630fecfd9
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, many of which are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://nipisod.ru/strik?utm_term=black+and+decker+workmate+200+parts PDF link annotation
    • http://xogunajeraxuda.mywebcommunity.org/68040131502.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/Ogdhige/turikamatapidisukofubak.pdfIn PDF document text
    • http://maxiteguf.medianewsonline.com/28659428651.pdfIn PDF document text
    • http://patedeziw.mypressonline.com/dovuxubuwirix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446390/normal_5fe2b3f7e53a7.pdfIn PDF document text
    • https://cdn.sqhk.co/zonigita/agjImji/13990252060.pdfIn PDF document text
    • http://homeolimp.com/46160772340l7pgf.pdfIn PDF document text
    • https://cdn.sqhk.co/digiwejasipu/097VKGj/rekojotutepevavodezob.pdfIn PDF document text
    • http://busivel.xyz/7338888550ni9vl.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/84083018802.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5fc9a19dad0eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380086/normal_6027be1982d14.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/ghcWhjG/father_and_son_pizza_on_milwaukee_avenue.pdfIn PDF document text
    • http://paruxezogu.mygamesonline.org/27039837982.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/addition_worksheets_5th_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/vakujediraw/higdCgc/zebum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413016/normal_5fc66755e4ee2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407069/normal_6021c35f520e4.pdfIn PDF document text
    • http://tufinanegonaj.medianewsonline.com/95234564331.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_828ddd2e8f5c45ed895bb10878bf521e.pdf?index=trueIn PDF document text
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_9582d9d8a5a944b688519f2576633ce3.pdf?index=trueIn PDF document text
    • http://laxolagodofomug.onlinewebshop.net/wuwanin.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/what_is_the_most_important_feature_of_the_diffusion_of_innovation_theory.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/15619408101.pdfIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_f845369e2db14e51acd777e7689ddefa.pdf?index=trueIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_383eee2dae34472f8def7b2dd2866deb.pdf?index=trueIn 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_off0000f3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E4 5700 bytes
SHA-256: 4a946db92585d562e09e0f5e82e01b7bc81f803e08be5bdda513e3a4df3bdbd2
font_01_sfnt_off0001074d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074D 10804 bytes
SHA-256: 2ecb98eb26fddf048c202e8fa8b54ae5a49485ce8c253484aa7db3616f04b58a

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