Malicious PDF — malware analysis report

Static analysis result for SHA-256 860a270bd720baab…

MALICIOUS

PDF

63.3 KB Created: 2020-11-21 13:10:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 55abfdb0bd2f6712b6f1709acd22fe52 SHA-1: 1ca735b073c485ec6af71b9e142022c5a29f24e7 SHA-256: 860a270bd720baabc89650004f6dbcc03a20cd28e24ceab8dadbe564adc3c025
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a phishing or redirection attempt. The presence of a malicious ML classification and ClamAV detection further supports its malicious nature. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffking.ru/123?utm_term=oreck+orbiter+manual PDF link annotation
    • https://vefekigut.weebly.com/uploads/1/3/4/3/134391246/jevuvitodovibu_wuvet.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/15a30b0ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413564/normal_5fb51b4fbbafc.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/7e5304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5fb4640b25a35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410015/normal_5fac2e439d016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_5fb34a25d5280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373522/normal_5f8f077417a57.pdfIn PDF document text
    • https://gimelukisisira.weebly.com/uploads/1/3/4/0/134040832/tugen_suremupipiso_raxufebelenid.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/mogelebolep/symbols_in_hamlet_act_2.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/lapotejapozi.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/juego_cazadores_de_mitos.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_off0000bba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA1 4996 bytes
SHA-256: 56a65237df91c88b126c7843600a3b94a4c2359c8a1c8dd1ae65ac9cd090de7c
font_01_sfnt_off0000cc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC87 10668 bytes
SHA-256: 3b945aa27cbfe9d2107704c2b3bce1ff846320fcbcf4b54817f0269610288f2c

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