Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dbbb477bac24e90…

MALICIOUS

PDF

75.5 KB Created: 2021-05-25 11:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d59d1b5bdb61c17a0ec30c4c8985cbef SHA-1: 43673047ecb2a062aad18f930b4d2424068efb5d SHA-256: 2dbbb477bac24e906573aa15d83243bd884c93656497f09b7c4ec2389b59d80b
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and external links are indicative of a lure to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=2020+mitsubishi+mirage+owners+manual PDF link annotation
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/15f40b2232ba5.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/mekofolezogokid.pdfIn PDF document text
    • https://gijedilegin.weebly.com/uploads/1/3/1/3/131380969/nabano.pdfIn PDF document text
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/firaleragenax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449192/normal_5ffba5b90cb2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383915/normal_5fe267c8bdc04.pdfIn PDF document text
    • https://wevukizolizeki.weebly.com/uploads/1/3/1/6/131606758/ribufinat-mezodokitise.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383800/normal_5fce956c49eb0.pdfIn PDF document text
    • https://torolanomopefi.weebly.com/uploads/1/3/0/7/130739669/9042613.pdfIn PDF document text
    • https://gisoroweri.weebly.com/uploads/1/3/4/8/134893792/bafirepin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381551/normal_602c91c17ebd6.pdfIn PDF document text
    • https://zadevadetolilug.weebly.com/uploads/1/3/5/3/135321342/70d7d3d50b5a697.pdfIn PDF document text
    • https://jejegufixi.weebly.com/uploads/1/3/2/7/132740716/vatonam.pdfIn PDF document text
    • https://defelidiko.weebly.com/uploads/1/3/1/0/131070982/7bd91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_606b333de3dcd.pdfIn PDF document text
    • https://zitipijasidigor.weebly.com/uploads/1/3/0/8/130874434/juliminikitabo_vakesogalomi.pdfIn PDF document text
    • https://vajugape.weebly.com/uploads/1/3/4/7/134767319/ravejefilowixav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/setugorejoxetivav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa2ce0d1-8ffa-455f-ad00-d61f315c3b89/lonely_planet_magazine_india_september_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba8a4c6b-1f8d-4fc9-b336-39dad290a80f/86486823184.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/ibm_selectric_ii_typewriter_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f51ee5d8-e1f4-4987-9c15-36df13f98b54/lutokawufelexipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6202254-4910-44d6-9c54-7177ee16f7c5/roduxokidonafobi.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/jedetika.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_off0000e85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85D 5512 bytes
SHA-256: df79e79d8b7cae1c4a77c5edbbe1d3a43c203ea7ef6c49f0c7d5f693ec5020a4
font_01_sfnt_off0000fafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFE 11004 bytes
SHA-256: 6db4bc042f98dbeadd9fb0afb27f4ac5fca99bf0c4453988d66055d7182335fb