Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f03025eb9c40d9…

MALICIOUS

PDF

70.4 KB Created: 2021-03-07 12:37:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 058e4e9648b5afd054b84bef4c74fcae SHA-1: 64678c5cbcfa63b80ee0eacc9cd5abc01dbc8e43 SHA-256: 56f03025eb9c40d97fa81c65d1341a0f76f7bdf8dd352aec70e1e983098ea943
96 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains embedded URIs that likely lead to phishing or malware distribution sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content, consistent with spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/wix?keyword=finding+mrs+claus+2012+cast PDF link annotation
    • http://bikelumonekodex.mygamesonline.org/the_little_prince_ebook_download.pdfIn PDF document text
    • http://tupakewufitid.iblogger.org/blackfoot_river_fishing_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485946/normal_5fe14237afdd7.pdfIn PDF document text
    • http://vipinisejes.22web.org/vermont_castings_intrepid_1_parts.pdfIn PDF document text
    • http://nikupajosokob.22web.org/gitexerugelakumava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453579/normal_5fd7a6e3b580d.pdfIn PDF document text
    • http://jukavoluv.iblogger.org/hp_4630_scan_to_computer_mac.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/tedowafomaru/ladolisanutabukisupor.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/joindre_sur_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/nevaxuwasifitezafoxigur.pdfIn PDF document text
    • http://sanugifop.atwebpages.com/what_is_the_theme_or_message_of_the_gettysburg_address.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0db467be-1c81-4993-b49c-9c5a3adf07ed/kindergarten_math_practice_book.pdfIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_3a9b226c4c51492fb8ec11269f7e8f0b.pdf?index=trueIn PDF document text
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_1a2acfe6cbc24137bbf60e7d7e88e9e8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/383327a6-3a7c-409e-a04f-beef04d3aa23/76557315095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/084a23f3-b8df-4f66-a19e-02ea7fd7baa8/how_to_clean_the_lg_inverter_direct_drive_washing_machine.pdfIn PDF document text
    • http://sajatuvireguta.atwebpages.com/roland_fa_o6_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f085ffd-3f3c-449b-908b-53743c89b645/how_to_replace_the_rubber_seal_on_a_front_load_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/jifedefeki.pdfIn PDF document text
    • http://pulitisagot.atwebpages.com/3964670530.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_off0000d499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD499 5540 bytes
SHA-256: a21c906bd02e4444c231028290e675abbee19a606c1084941489b6979f2a7cdc
font_01_sfnt_off0000e763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE763 10792 bytes
SHA-256: 579daa1f13dbb44993838e2a3147b912440f2a5148a9a694c58f63974e2ff413

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