Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59a13aad35d4f55…

MALICIOUS

PDF

100.4 KB Created: 2021-03-10 08:04:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4bf408cb85436df8596baef44f248de2 SHA-1: 9c8cc208b1e3a3534ad993bf9e2e07fd270d1716 SHA-256: f59a13aad35d4f55b47394e83ad39b2561bfa48fc1d21bad73511fe741fe4a40
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the nature of PDF malware often involves embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/aws?utm_term=snapper+lawn+mower+parts+ireland PDF link annotation
    • https://bemesamug.weebly.com/uploads/1/3/4/7/134722017/xokonu.pdfIn PDF document text
    • http://faxixovojaja.sportsontheweb.net/best_grammar_book_for_high_school.pdfIn PDF document text
    • http://getyourcredit.info/mepebupujiferaroraxumsfjzf.pdfIn PDF document text
    • http://show-visitor.xyz/walesi_live_streamvnbe5.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/22890480775.pdfIn PDF document text
    • https://rafogemi.weebly.com/uploads/1/3/4/7/134754229/953183.pdfIn PDF document text
    • http://accface.in/kamotokifotafiloduxuludmy66b.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/what_is_the_difference_between_ts_16949_and_iatf_16949.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/toguvaju/23825854708.pdfIn PDF document text
    • http://jaxages.epizy.com/fegexilijomama.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/kenmore_dryer_model_110_disassembly.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/40995512468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d268a739-775b-4de3-a88f-eec03eb37b30/how_much_time_does_it_take_for_a_girl_to_fall_in_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39048021-78e0-4ce3-bff3-758e406dce1b/curtis_sno_pro_3000_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/256dbeea-1d99-436d-bc30-321f5f0dd291/7796217098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/094cb4bc-50d2-4bc8-8334-35efb452888f/whirlpool_d10_water_cooler_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/75978323010.pdfIn PDF document text
    • http://nurejorafu.epizy.com/adam_smith_la_riqueza_de_las_naciones_anlisis.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/13533008781.pdfIn PDF document text
    • http://fepetixapokurob.myartsonline.com/54413015030.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/open_outlook_template._oft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0088c0f3-724a-4d3b-8b3e-5ac3d209acd2/vikikevijifexawovepagof.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_off00014c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C2D 5300 bytes
SHA-256: 626c91111783035cf8a315df76562254d293dcd701622ecf04a9c48e2367248c
font_01_sfnt_off00015e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E2C 11028 bytes
SHA-256: 46e6e70fd9e70ffd7ee44ddee358a31448238e77bd251b067a4950592043137b

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