Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1adf4c9766727a…

MALICIOUS

PDF

75.7 KB Created: 2021-03-27 10:04:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b7872faa53b7144b7ba26472339414a1 SHA-1: 235156c2b83d0ad0d9927cee3bd95c9f67e8f51f SHA-256: fd1adf4c9766727abcf0454a46945055ebb842372378feb4acab2b9c2e80e86a
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting, indicative of a link farm designed to obscure the ultimate destination. The 'SE_DOWNLOAD_BUTTON' heuristic suggests a deceptive call-to-action, likely intended to trick users into downloading a secondary payload. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://golowaki.ru/strik?utm_term=the+believer%2527s+authority+andrew+wommack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470224/normal_605bf29fbea95.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/7iee4gf/19757241138.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/1302851710.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/delonghi_magnifica_esam_4200_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472503/normal_5ff13faf4056b.pdfIn PDF document text
    • https://cdn.sqhk.co/bozutebux/iihbkif/80581608560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378845/normal_60260b026a995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_601314c866ec9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481834/normal_5fe3e0c2c9246.pdfIn PDF document text
    • http://wuwudikosegukem.mypressonline.com/60740790656.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/31110739792.pdfIn PDF document text
    • http://sopugepibimel.mypressonline.com/total_knee_arthroplasty_rehabilitation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_ecc15c0670574cff8fd04edb6569746a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadedosi/adblocker_ultimate_safari.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/business_development_plan_ppt_template.pdfIn PDF document text
    • http://rijemow.onlinewebshop.net/bangalore_route_map.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/vezezad.pdfIn PDF document text
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_804c60d347f849149c5c944f9490091f.pdf?index=trueIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_9eebc22bd5b34e37b8fd8cdd30984b3c.pdf?index=trueIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_2302f4786edb424caef026dc46298c10.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/tedugajenawijewokixuka.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/36327391939.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/76437689625.pdfIn PDF document text
    • http://bowegasobufur.myartsonline.com/jefugosawarumibevoj.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_off0000eaac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAC 5620 bytes
SHA-256: 230f5530703f4f100a4e6f9d1461197c1db487243563c62c8a6f34c7c56a593f
font_01_sfnt_off0000fdb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB8 10376 bytes
SHA-256: 461d1885a063bc2be6a21774e77901c7d4b4d115837eaca7c41a97f4243f8267