Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45c28db8cb7df44…

MALICIOUS

PDF

78.5 KB Created: 2021-04-02 10:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 47ed0c073fe92d104c84bf8a65413dee SHA-1: 5532007cd2557c16eef21117d1ee4ad71575315c SHA-256: b45c28db8cb7df442af4ca7b4b2ac248d1030087c5b1a5de644c0a5d2dc5a3dd
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple external URLs, including one directly linked to a potential phishing lure ('award' keyword), suggests the document is designed to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely leveraging social engineering to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/award?keyword=bass+guitar+tab+sheet+music+pdf PDF link annotation
    • http://pearhaidhr.fun/robot_vacuum_cleaner_reviews_australiaxjhis.pdfIn PDF document text
    • http://blancer.xyz/in_the_heights_musical_original_castmfjn5.pdfIn PDF document text
    • http://hh666o.site/beatles_yesterday_guitar_tabcdnle.pdfIn PDF document text
    • http://mmamba.ru/lijosalupivoviwfwky.pdfIn PDF document text
    • http://universityru.fun/bajodafikijasebidudexu0skvw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451737/normal_6041c9f5d5fe8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_6019b1ceae665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_604e8c2b40b5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417305/normal_601fdd8c65f40.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/wekibik/grammar_worksheets_indefinite_pronouns.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/98968146085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7963483a-2a17-44f8-b45b-09f33383f0ca/50419543686.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/fighter_diet_workout_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0389a2e0-e8ed-4e29-9950-4122f20d5b8e/vans_old_skool_junior_grey_checkerboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e2becb-4942-40d1-b427-2204702eb6b0/fipimegotabonatobir.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/difadagow.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/mevujolosifamulur.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/18383261106.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/vevokegesibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/396b66aa-270d-440c-86f4-df7a5353052f/12970489393.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/what_makes_a_research_instrument_is_valid_brainly.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/stremio_alternative_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17bfb9dc-0ccc-4509-add1-e431acb4b4e5/where_is_the_ip_address_located_on_a_canon_printer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d010e29-c68b-46bb-9cf6-4c824e657d8d/gazidinoxefenugazatuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f4017e-d9a2-464b-a574-7cf5d92c8ad8/sizamugezudafogemelanulef.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_off0000f48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48E 5724 bytes
SHA-256: cc87314fb85cfc15fa80953c90f43bde47bdfc8ade25eb19d3d7df1d45a5df4c
font_01_sfnt_off000107da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DA 10668 bytes
SHA-256: 55816a4dd9bcc1f89975cd8a06015f693c283268044b695cdeb0ffa6a5ef5be1

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