Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97bf41f52404f2f…

MALICIOUS

PDF

69.2 KB Created: 2021-01-01 06:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 23fc1ec7b851ef6a9cd16b12483c7179 SHA-1: 8b78b5a479d76bf42dd7a6b844eae80465157aec SHA-256: a97bf41f52404f2f52ab15cf2fd96f5bb39d9edf6b6f821a1f248461d3baeee7
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The heuristic firings indicate the PDF is designed to link to a large number of external PDFs, likely for SEO manipulation or to host further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/strik?utm_term=t+mobile+ceo+number+block In PDF document text
    • https://nimaxosonoj.weebly.com/uploads/1/3/4/8/134897368/a193be3fd.pdfIn PDF document text
    • https://rujupiben.weebly.com/uploads/1/3/4/8/134852491/nisidota-wofagujotib.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/3778895.pdfIn PDF document text
    • https://zewerigavuj.weebly.com/uploads/1/3/2/6/132681779/990413.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/29129ab4-6410-4f35-8921-bf33f6116a5b/formule_calcul_moyenne_avec_coeffici.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a68b7560-914c-4d9d-9c20-20ef3af41d14/niwab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b20d94d8-0ddc-430c-b207-50cfa51fe022/fpsc_challan_form_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dc3d08d-d22f-46dc-a591-4efbf076ec60/27464326969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6407fa56-1e45-45df-a4a2-ff971db15161/option_profit_accelerator_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff84d372-6405-4291-9390-d59f874d550b/the_quintessential_quintuplets_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b4a3ac2-3dbe-4caf-ae32-68d70b5ec82f/dipozopogaxijokaziforew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d577636-9da9-4b76-8cbb-7e06653a6b9d/google_sheets_importrange_query.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_off0000d3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AD 4712 bytes
SHA-256: 7ee3ea8c305611353d14e27f0a3014d8ca0d8e421250d172432b621ed8bdf00d
font_01_sfnt_off0000e39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39E 10884 bytes
SHA-256: 5bebad2b0edf1c43dddc3327ec2d8a1cb85a53898a1c077a98cea542471fe38f

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