Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ebbaf08f2d2e50…

MALICIOUS

PDF

77.6 KB Created: 2021-05-18 03:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 88dd8a10697578202f61bf1b37ef7975 SHA-1: 21430fcda26715e225481b20cc21bf41628268be SHA-256: f1ebbaf08f2d2e5015cd051156b3bc4b2d0969121e9cafaabeb1072075ce950f
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The file contains a large number of embedded URLs, forming a link farm, with the primary malicious URL being https://dafemum.ru/strik?utm_term=lwarb+beta+para+ios. The presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/strik?utm_term=lwarb+beta+para+ios In PDF document text
    • http://fifuxuzod.iblogger.org/1339620547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_605b13bd7cb01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_6016f05b621ae.pdfIn PDF document text
    • https://jiraxoxaxizare.weebly.com/uploads/1/3/4/0/134012395/c8f9ac086ca5.pdfIn PDF document text
    • https://piladokad.weebly.com/uploads/1/3/4/7/134759874/e01d72ac90e10aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492593/normal_606c9899ce3c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388818/normal_6012bba9d03ed.pdfIn PDF document text
    • https://zovipimisog.weebly.com/uploads/1/3/1/1/131163747/domepila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402722/normal_605b37bf4225b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382779/normal_5fd3ba819e653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_60136c4da0912.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/b73429c9-f313-4c77-97df-b6611ee3307f/cie_a_level_chemistry_periodic_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d036af-c7b5-4f1b-af4e-b21184d736de/xomitiwapunaxufumalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5acb5a58-7cc5-458c-aba5-9c80db27fced/97484984465.pdfIn PDF document text
    • http://lepigofogirevog.epizy.com/zoseboxuwudademojig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c3b8d34-06bc-49fc-85ad-a433903a1ede/sasot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ebc44d-d94c-4a63-b93e-ae4a2fd105b8/viweturunefani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c918158-2454-44f3-84d4-4e56f623c6bc/loriketitemesuzemegoguvor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/836753b5-6d66-487b-93ea-4c908b6807c0/16784244267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6724603d-b452-4a94-aa0a-e12633e63e2a/garmin_vivofit_active_3_review.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_off0000f219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF219 4956 bytes
SHA-256: d662b2628b79ec0db77dcb8fe01b741d3f1364a372cca2167b416a0a8590c449
font_01_sfnt_off00010316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10316 11120 bytes
SHA-256: 80d159736cf28f644970d8103041351094140695fc480afe930b8098d1f10c25

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