Malicious PDF — malware analysis report

Static analysis result for SHA-256 948ddd91f000fc7e…

MALICIOUS

PDF

60.4 KB Created: 2020-11-23 20:06:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 825a5e92c3daeca38ad02909cd7f99b5 SHA-1: b606a39b3ad594f4fffb323dbcdc8a96f832b452 SHA-256: 948ddd91f000fc7e09f94250ea39b8c7d7f46772206b1193ccf701766e22a2b8
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'pmi the standard for program management pdf'. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to phishing or malware sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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/123?utm_term=pmi+the+standard+for+program+management+pdf In PDF document text
    • https://neseriduro.weebly.com/uploads/1/3/4/8/134851425/3689078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393345/normal_5f947e8b75bee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426421/normal_5f9fb64136a6b.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/c7f2ab90-7c98-4bd7-84f2-baf5acfb0695/fisica_1_hector_perez_montiel.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/camera_gadget_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dd44b9e-8f49-47d1-9ce9-cd10329216f8/gotonizopaxesemi.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/skyline_ranch_resort_front_royal_virginia.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/free_wedding_timeline_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/5th_grade_reading_diagnostic_assessment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/021b8c08-1039-4feb-a112-d94e3f179a61/democrips_and_rebloodlicans.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/targus_ipad_keyboard_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/48627541954.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/camel_cigarettes_price_per_pack.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/bsc_1st_year_mathematics_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6366ee0-0618-4d2e-a8a5-dc9f722c4ed1/golden_gate_theatre_box_office_hours.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_off0000af67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF67 5424 bytes
SHA-256: 43b04624d6435b01ab2418323cca4285d1aaa47218803c101e0418b90aa82c18
font_01_sfnt_off0000c1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B3 10492 bytes
SHA-256: e1042029b3ddd5f8f4ded46670ccb2a088ef13318a31fe807d9487e431e21507

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