Malicious PDF — malware analysis report

Static analysis result for SHA-256 6574768dff812e40…

MALICIOUS

PDF

85.7 KB Created: 2020-12-28 08:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e1636fbe10aa4bdcdb46f76d9aa64a22 SHA-1: ee40a34491ed802246f12035076feb28e633bbca SHA-256: 6574768dff812e401499a83c4490e655b24a74eacdc4fde752882b779b9795a1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files hosted on link farm services, suggesting a SEO poisoning or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The embedded URLs, such as 'https://traffnew.ru/strik?utm_term=nfl+network+app+not+working+on+firestick', are indicative of a lure to a malicious domain.

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
  • 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.
  • 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://traffnew.ru/strik?utm_term=nfl+network+app+not+working+on+firestick PDF link annotation
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/juxovopud.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/cEby2ji/tegirolofixividujoxubamef.pdfIn PDF document text
    • https://luvepuxoworusoj.weebly.com/uploads/1/3/4/6/134660421/vupumipalovig.pdfIn PDF document text
    • https://cdn.sqhk.co/rurokusulos/W6ibhfO/eye_of_the_storm_idiom_meaning.pdfIn PDF document text
    • http://www.opentle.orgIn 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/defed677-d9c0-43c8-91c4-31801dd6eeb8/fepomonuwawafasera.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/clutter_hoarding_scale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec46d441-3a38-4f4d-b04f-f36c1c47c0ef/big_little_farmer_offline_farm_unlimited_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e289cbd1-75e8-4aae-a878-2e965a7d2030/gafiro.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/ielts_listening_total_insurance_incident_report_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/canine_guided_occlusion_classification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91d106c3-833e-42d2-a24a-f474ea3c27a2/xebawod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04bdce50-68bb-4700-8ec4-03a414103707/zewopikofowawate.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/bibemul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21f8220e-9b40-4384-a471-53bec8d03a43/66950752016.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f9cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF9CD 15308 bytes
SHA-256: a1647697540d909dfaac6690e124d6d189d661b14bdf1352f9136aba459f0c3b
font_00_sfnt_off0000e796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE796 5308 bytes
SHA-256: 05a880791b0363692d6a24f7357fa55ab000c009f7f59a74f6ec86dcaec4a3ac
font_02_sfnt_off0001241d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241D 10864 bytes
SHA-256: 9b140bb97b686a83071cf4b665385024ce2d1bd511a383c3bf1d08f97cb30cb1

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