Malicious PDF — malware analysis report

Static analysis result for SHA-256 a908a9b73378b931…

MALICIOUS

PDF

107.3 KB Created: 2021-05-18 17:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1bf107f0321635a8cb86c4fee7ab50cf SHA-1: aca62f3fe14ea47116f5a650a188e462319ce7d9 SHA-256: a908a9b73378b93110a067c175ab0eafe72e7e6f2fd765ead2af5a38ee061e78
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure related to baking with duck eggs, which redirects to a malicious URL. This URL is identified as a phishing attempt and is flagged by multiple heuristics, including ML and ClamAV. The presence of embedded URLs and the overall structure suggest an attempt to deliver a malicious payload or phish for credentials.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=what+can+you+bake+with+duck+eggs PDF link annotation
    • http://sobuvowoxemati.iblogger.org/alleluia_jubilate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479445/normal_60184dc6e7d0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417995/normal_605b6707e31b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465386/normal_600caa571d51f.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/962f9361-306e-40ea-a4eb-8888d33a72a7/does_dash_diet_help_you_lose_weight.pdfIn PDF document text
    • http://fofeparulofiz.rf.gd/boss_tu3_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/71865158482.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/punekiduvopizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07f1ce51-b361-43b8-bba0-0c7976b42135/20990764472.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/78942805352.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/3527626925.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/4-2_practice_congruent_triangles_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/kenmore_ultra_wash_quiet_guard_deluxe_model_number.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/evan_moor_3rd_grade_curriculum.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/vofirorukikopokulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d49edbaa-7c4c-4649-9127-78f2ac368808/47407290854.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/ziduvodeninetodipi.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/44611429630.pdfIn PDF document text
    • http://zimunumiwu.epizy.com/sejizek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d16e0b25-0b47-4e17-ba0b-4114cf7ff7a1/what_is_a_literature_review_example_for_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b675134-c881-4391-a91e-1f580760a91e/44311739886.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_off000161e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161E0 5484 bytes
SHA-256: d561e862ef0b86aa3126a72e0293300217ac7acee8f6d0ae8cf8c71711094196
font_01_sfnt_off000174a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174A5 12176 bytes
SHA-256: f6c6a7bedd2a95c96d17797d1501d7a40807a79ed67ad33381c8d5e9fd9a0222

Open this report in the interactive analyzer, or submit your own file for analysis.