Malicious PDF — malware analysis report

Static analysis result for SHA-256 e996abfa02ba4b51…

MALICIOUS

PDF

74.2 KB Created: 2021-06-10 08:39:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bfd796d491c67805ac98b9bafbb2a1a6 SHA-1: e8c1158a3bdc787b15ecdc786727ad5c44002b13 SHA-256: e996abfa02ba4b51a16693cbdafde22a2737c58ffd412777483bcb5b78cc32f8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://nomylo.ru/pbw?utm_term=evaru+telugu+movie+download+jio+rockers PDF link annotation
    • https://buzolemego.weebly.com/uploads/1/3/5/3/135393469/kavilopukuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454301/normal_603a792684241.pdfIn PDF document text
    • https://mipumitazolepi.weebly.com/uploads/1/3/4/4/134495795/7324911.pdfIn PDF document text
    • https://lajakobu.weebly.com/uploads/1/3/4/5/134599687/rasodoseges.pdfIn PDF document text
    • https://pigukoziluluz.weebly.com/uploads/1/3/4/8/134896600/toruderajen_wadesedeganete_lebomesate_dijufajar.pdfIn PDF document text
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/dizakosu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366014/normal_5fc86e8abdb78.pdfIn PDF document text
    • https://vekekugez.weebly.com/uploads/1/3/4/8/134883785/duzewulufel_rumaxositumaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_6068c7900c33f.pdfIn PDF document text
    • https://wubobuxidozexe.weebly.com/uploads/1/3/4/3/134322977/da977aadd0034.pdfIn PDF document text
    • https://zivogozupitis.weebly.com/uploads/1/3/1/4/131406352/c705e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f87068-4471-4574-a7f8-503be7709ef3/what_does_yellow_triangle_mean_on_outlook_icon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f98a4c46-f3f8-4685-912c-1dc255c0e774/26973770971.pdfIn PDF document text
    • http://kepigiwup.pbworks.com/f/zodupivugeteduxev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fee26005-e0a9-4238-b31f-73636b335f1c/nopiroz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbe8817-8961-4399-90bf-d61aae645f95/qualitative_research_design_sample_thesis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b51720-8c6d-4e3f-bb0e-88dab4e6accf/does_technical_writing_pay_well.pdfIn PDF document text
    • http://tosuvop.pbworks.com/f/xenoledutupinozuzavabad.pdfIn PDF document text
    • http://xumefosux.pbworks.com/w/file/fetch/144579678/xoloburaxeziv.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_off0000e442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE442 5508 bytes
SHA-256: 345a4ef4881483ec46dcb5f7b6ec864ad717b930723a1b72f7bd6b591e0c0235
font_01_sfnt_off0000f70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70B 10596 bytes
SHA-256: be2acfa6975dd98f0cb3b84ed2b806dcb3ae8c5f0a0e584f89e8c7529d01b3ed

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