Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8b0523c8f983c8…

MALICIOUS

PDF

74.5 KB Created: 2021-01-16 02:07:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fe4b99a7e391b79af174da94f495d2f7 SHA-1: e95bc46c2dcf28f6455c2e6b8db19a0d8ebe40f0 SHA-256: fa8b0523c8f983c82039457f6422504daa561847c6d394e172894fbd40da66fd
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO link farming or to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the PDF structure suggest it's designed to exploit users by directing them to potentially harmful content, masquerading as search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://traffnew.ru/aws?utm_term=best+bollywood+sad+songs++mr+jatt PDF link annotation
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/4214636.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/giwolotiwipeguber.pdfIn PDF document text
    • https://site-1173209.mozfiles.com/files/1173209/selezinoxatoze.pdfIn PDF document text
    • https://kusazejur.weebly.com/uploads/1/3/1/4/131437880/dadulixi_gesaxaso_sexiwikoxede.pdfIn PDF document text
    • https://site-1174029.mozfiles.com/files/1174029/angular_number_format_currency.pdfIn PDF document text
    • https://lefewaxenu.weebly.com/uploads/1/3/4/0/134012542/8670788.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/zategafozasiru/ponoriwigem.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/54286589785.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/mopar_auto_to_manual_transmission_swap.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/ielts_speaking_topics_with_answers_2017.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD057 5604 bytes
SHA-256: f62f7308e9f02a933370340976760662dd83400f588da053cb56e07adea0481d
font_01_sfnt_off0000e36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36A 11204 bytes
SHA-256: f22f3da3631efd74ea514aa3d7859854c4e6f3ffd40f715eb4913dcb6063b3e1
font_02_sfnt_off000108aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AA 16076 bytes
SHA-256: e1ecdaf5f931254822c08e14176e742ed940844fb6ecb9fcb1e73603f1784b15

Open this report in the interactive analyzer, or submit your own file for analysis.