Malicious PDF — malware analysis report

Static analysis result for SHA-256 95714c9be958fb99…

MALICIOUS

PDF

60.2 KB Created: 2020-11-21 00:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2610f06427f66f9320f1e60142931183 SHA-1: 91bc0a56dbe0feb349e375646553ca6e0a2e15a6 SHA-256: 95714c9be958fb99898d78012ed566890a4a504b1339138509cdc21a320e1082
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics, including a malicious redirector link and a link farm, indicating a phishing or spamming campaign. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which likely leads to a phishing page or malware download. No scripts were extracted from this sample, but the embedded URLs and heuristic firings strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=valley+park+elementary+school+blue+valley
    • https://zijavenokin.weebly.com/uploads/1/3/4/3/134315340/femebiwavivodef.pdf
    • https://lafuworopiraw.weebly.com/uploads/1/3/4/3/134341657/afa7c7a650.pdf
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/jatelu-zukolugaw.pdf
    • https://cdn-cms.f-static.net/uploads/4450337/normal_5fadf7165666e.pdf
    • https://guboriratuji.weebly.com/uploads/1/3/4/2/134235556/4edfac1a2.pdf
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/1455617.pdf
    • https://cdn-cms.f-static.net/uploads/4446395/normal_5fa5e050d2b27.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gizonukorad/user_manual_for_craftsman_garage_door_opener.pdf
    • https://s3.amazonaws.com/wesezuzuvalirik/tekken_3_apk_download_free.pdf
    • https://uploads.strikinglycdn.com/files/23f5d56d-fa32-4179-8dae-ee707c3bf8f7/mupaxa.pdf
    • https://uploads.strikinglycdn.com/files/7efa1c98-49ed-4a22-918c-f2db241a392e/sample_letter_of_financial_support_to_wife.pdf
    • https://uploads.strikinglycdn.com/files/fb55ca38-0e60-416d-9246-71f3522c78af/15410071897.pdf
    • https://uploads.strikinglycdn.com/files/24b42b71-858f-480b-860b-cabec96ddc91/bdo_courser_training_guide.pdf
    • https://s3.amazonaws.com/gajakelegeza/matujela.pdf
    • https://s3.amazonaws.com/tojabixefova/95423301032.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aeb0.bin
24e49350b3932c6b8d12f905acbc8078379c26e9947ac1bfc536264eed399cd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB0 5504 bytes
font_01_sfnt_off0000c147.bin
81b1de8131527dc965b349affbd824861aac9793847ba3e4708ee1c7453c9893		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC147 10160 bytes

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