Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3061205896c7fba…

MALICIOUS

PDF

67.1 KB Created: 2021-01-02 10:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0a88a3199f0450a11a54074d5eb3cd9c SHA-1: 2655e777d4b5b8258a0c3d087daf9cc189118b3a SHA-256: e3061205896c7fba5124ce44ac42b34cd9a029deba86d1b0ef00bda41d1e172e
214 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically disguised as a WhatsApp download. The ML classifier also strongly flagged this PDF as malicious. The embedded URL points to a redirector that likely leads to a phishing or malware download page, attempting to exploit user interest in popular applications.

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://cctraff.ru/aws?utm_term=whatsapp+app+2019++for+android In PDF document text
    • https://tivagirususu.weebly.com/uploads/1/3/5/3/135350390/pelitojuve_nemunaburixide_talorexozes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5f87e65a34ad8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481067/normal_5fcb2f7945ca3.pdfIn PDF document text
    • https://cdn.sqhk.co/xubenijevewe/5r5Qics/58090702747.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/54da4e72-3405-4d3d-a9d0-d159aa30dbcd/free_psn_generator_download_no_surveys.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/kia_stinger_gt2_performance_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d15ce9-311b-435c-b10e-1d5a58f62d56/salton_yogurt_maker_model_gm-5.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/bountiful_ridge_golf_course_tee_times.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/xatasusatunowoju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f05db98-e334-41cb-8bc5-cbf22460905e/59935547542.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/73391918109.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/quarterly_compound_interest_calculator_excel_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a3f516-1ad6-4f9a-b455-ad9347bc1f56/21310720477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57304cb1-db69-4902-8ad2-cdb86820a472/valence_electrons_and_ion_formation_worksheet_answers.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_off0000ca1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1A 5592 bytes
SHA-256: 5d426b47c618e08088b204bfbaf0ba9ca0b5c7a3c99eca1674f44ca3c585df65
font_01_sfnt_off0000dd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2A 10008 bytes
SHA-256: fc32917cffd9ef79f6528ae1c61941e3e04ebb19ebfdef1dcca6dfc31a70847c

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