Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0472ab83c4879bc…

MALICIOUS

PDF

77.1 KB Created: 2021-03-18 09:28:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9cc156052c06cd7778ea4ddefa105332 SHA-1: e1297dc47b787f84f94faa9bfb938fecea9d444e SHA-256: f0472ab83c4879bcbda818aee39c733837acf70c474d930a83f179844521af9b
194 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/wix?keyword=order+and+chaos+2+mod+apk+rexdl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387424/normal_601bdff701d54.pdfIn PDF document text
    • https://zofigaxukinepir.weebly.com/uploads/1/3/4/2/134235574/mijuligelusoxisedom.pdfIn PDF document text
    • https://sopodepewujo.weebly.com/uploads/1/3/4/3/134340903/kakikig_jogapoxoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_600f26e1b7c2b.pdfIn PDF document text
    • http://muwiduvepobuz.mygamesonline.org/10929328902.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379723/normal_5fc68194d21cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_603ab59d586ad.pdfIn PDF document text
    • https://turezizudowan.weebly.com/uploads/1/3/1/6/131606253/3066558.pdfIn PDF document text
    • https://tojogemul.weebly.com/uploads/1/3/4/3/134360812/zuwomufekoba-sekezobofug-jabode.pdfIn PDF document text
    • http://tokiridevifo.medianewsonline.com/basic_computer_knowledge_for_interview.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464297/normal_60395bb8297da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404285/normal_603e0877426e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484169/normal_604a495faab14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485703/normal_5ffa4114400b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jomopizemiz.onlinewebshop.net/68603352405.pdfIn PDF document text
    • https://d692b82a-d563-45ba-818c-0512d98079dc.filesusr.com/ugd/1c7397_b3f1fa07afe64d629d50e348bf1faade.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nademopor/14921850681.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/d_d_3._5e_character_sheet.pdfIn PDF document text
    • https://82656f1f-dd0f-4426-89ca-c5688288f975.filesusr.com/ugd/56de54_363f237a90fb4a8482bc8fb79c6f81d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/julius_caesar_summary_act_1_scene_2.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/chicken_farmers_of_canada_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/gofudum.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_off0000ee89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE89 5604 bytes
SHA-256: 9f58a5f637c514e1c194a20b1aa5e09357ac654048deb1fadf7d0f8acf421ec2
font_01_sfnt_off00010167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10167 11028 bytes
SHA-256: a9f66452c6e3f06842bc3d8c92a31649362922c8ce01970c6d4432d503660225