Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c29a4df5ead57ff…

MALICIOUS

PDF

73.1 KB Created: 2021-03-05 00:02:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ab392250bd3a24a33e8aea4bf87a023d SHA-1: e91eb124d3f18a84ddafe3018594335b31d58352 SHA-256: 7c29a4df5ead57ff24d19bbaf4bf458d9bcb6a3f88ab5fa9d951a26d7d43e17a
186 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, containing numerous external links to various PDF files hosted on disposable domains. The primary URL suggests a lure related to product issues, likely to attract clicks for SEO spam or phishing. While no scripts were explicitly extracted, the PDF structure and the presence of many external links indicate a malicious intent to redirect users to potentially harmful content.

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://seumenha.ru/award?keyword=scotsman+ice+maker+won%2527t+make+ice PDF link annotation
    • http://gudokav.sportsontheweb.net/examples_of_basic_sql_queries_in_dbms.pdfIn PDF document text
    • https://sirutobij.weebly.com/uploads/1/3/0/7/130776617/1846148.pdfIn PDF document text
    • https://dixufewopirar.weebly.com/uploads/1/3/0/7/130775961/9366763.pdfIn PDF document text
    • https://kojuvaneginumo.weebly.com/uploads/1/3/4/8/134890768/83342.pdfIn PDF document text
    • https://zatitudebijozi.weebly.com/uploads/1/3/4/4/134460539/lixibozid-fimawuj-morifenakobur-mixunelef.pdfIn PDF document text
    • https://gatodagimisosog.weebly.com/uploads/1/3/1/3/131379801/fufasenotu_fusekowaj_burafu_banepokelojoz.pdfIn PDF document text
    • https://bumitulag.weebly.com/uploads/1/3/2/6/132681993/lidolusofapojorexo.pdfIn PDF document text
    • https://zorepuwozodu.weebly.com/uploads/1/3/4/3/134399810/6354600.pdfIn PDF document text
    • https://pidufemimin.weebly.com/uploads/1/3/6/0/136054052/tobuzadibog.pdfIn PDF document text
    • http://vash-fasad.live/java_basic_conceptsre844.pdfIn PDF document text
    • https://pefisidedufe.weebly.com/uploads/1/3/4/9/134902532/f299e812d45310.pdfIn PDF document text
    • https://niregesop.weebly.com/uploads/1/3/0/7/130776037/2882bc0ee423.pdfIn PDF document text
    • https://livuwijonirib.weebly.com/uploads/1/3/4/7/134732661/7248407.pdfIn PDF document text
    • http://help-copyrighteamservice.com/faziviniw0d0d.pdfIn PDF document text
    • https://sisebafob.weebly.com/uploads/1/3/0/7/130776599/buwuba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/51993994254.pdfIn PDF document text
    • http://zerowegujij.onlinewebshop.net/players_handbook_classes_and_races.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_off0000e23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23F 5208 bytes
SHA-256: 3faf28d32ac294affb9c89f976416c0809548d6be5bed37e163ef58fadad7930
font_01_sfnt_off0000f3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FB 10216 bytes
SHA-256: 4946c8272ae343cd96742215549fa150e8bfd105cc35ca2a292251557d7405de

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