Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f49d59abde65977…

MALICIOUS

PDF

74.8 KB Created: 2021-04-27 22:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1ed6e82c9ddeaac96c4dc59309aed5a1 SHA-1: a66e812d1fad3d6da59e4caa7985b33a552fd7f1 SHA-256: 0f49d59abde65977cc5cde986c551c34d11297ec6c3c140b029e7ffdcef05529
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are hosted on dynamic DNS or file-sharing services, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though truncated, appears to be a search result for technical information, which is a common pretext for such attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://bologen.ru/strik?utm_term=how+do+you+read+the+error+code+on+a+maytag+bravos+washer PDF link annotation
    • https://nolujamikudaze.weebly.com/uploads/1/3/4/8/134868466/7433649.pdfIn PDF document text
    • https://gawidosenadipag.weebly.com/uploads/1/3/1/0/131069875/jimaruvuke.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/primary_school_assistant_teacher_exam_result_2020_download.pdfIn PDF document text
    • http://segijemidas.22web.org/63078371863.pdfIn PDF document text
    • https://vinifobak.weebly.com/uploads/1/3/5/2/135298549/vodifiziluwuzesomoju.pdfIn PDF document text
    • https://likerediweraj.weebly.com/uploads/1/3/4/6/134691167/kigufasotage.pdfIn PDF document text
    • http://vibijinit.scienceontheweb.net/35743515071.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_5d50c505e55c48acb7292d0df2a5b44c.pdf?index=trueIn PDF document text
    • http://pidalov.rf.gd/84016545722.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/81371962158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86e40ce-7a8f-4155-bdbd-b089a48cd7da/22563584891.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/sipogidax.pdfIn PDF document text
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_2be07e1f3e2f4d289b5594df62ba9030.pdf?index=trueIn PDF document text
    • http://xasejumav.onlinewebshop.net/body_parts_vocabulary_test.pdfIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_934d20797a1c4dee87ce53af748866b3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/574cb1d2-ee46-45cc-9f97-2883fbb03e83/secretary_interview_questions_and_answers_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/define_a_double_bubble_map.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/38369728185.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_2f0ad776b103433f90492adf1e3a22da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kotenu/proving_angle_relationships_worksheet_answer_key.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_off0000e5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F3 5676 bytes
SHA-256: dbe3589fb2192e71a688647e31b803c3338104d4bb52dd32fc4406d871e672ec
font_01_sfnt_off0000f933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF933 10724 bytes
SHA-256: b252c3ee82ddd9e93a49c65a32f509679e1b502a49f2ea213d43795a2b06bea9

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