Malicious PDF — malware analysis report

Static analysis result for SHA-256 2944efc1b7e42f19…

MALICIOUS

PDF

82.0 KB Created: 2021-03-11 20:15:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b9b739a94abb1114899dfaef19855172 SHA-1: 53b561b0da9e3fa6acd524a0043ed2e39e77843d SHA-256: 2944efc1b7e42f19e4323826b76171aaeeb3eb7884ebfe3820fc3cb3f2f592bc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/award?keyword=academicismo+arquitectura+pdf PDF link annotation
    • http://1offpark.xyz/what_is_the_difference_between_atherosclerosis_and_arteriosclerosis_quizletzoyaj.pdfIn PDF document text
    • http://masozaxo.22web.org/free_online_time_card_template.pdfIn PDF document text
    • http://gijokamamijole.iblogger.org/30092862622.pdfIn PDF document text
    • http://housefashion.ru/simile_worksheet_36u87r.pdfIn PDF document text
    • http://voseboler.iblogger.org/23155741265.pdfIn PDF document text
    • http://grinallex.shop/possessive_adjectives_spanish_worksheetpspwx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_26906e2e6ac6482ba7070ba610c82816.pdf?index=trueIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_444c6319b1b145ca9e7d2fc459f6e07b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pogolo/72520358555.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_72b44e45cfe34e84b246a0a0e40ce6f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wovugi/vba_dim_current_worksheet.pdfIn PDF document text
    • http://danofef.rf.gd/bosubanokulibozuv.pdfIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_367c883f6eac41cdac06f61c3456c73c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/90780341460.pdfIn PDF document text
    • http://dojiseb.epizy.com/how_is_going_your_life_answer.pdfIn PDF document text
    • http://borovob.epizy.com/monthly_meeting_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/android_tv_sony_49_inch.pdfIn PDF document text
    • http://damewanobojojo.rf.gd/65973183718.pdfIn PDF document text
    • http://dukedofabi.epizy.com/zezidazodugawuluraj.pdfIn PDF document text
    • http://bomiboduju.epizy.com/dugurorakulesol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CA 5160 bytes
SHA-256: 3f25b73fe79479318656e35af0b1e019448014b8d51b7df902188ede544ee7c5
font_01_sfnt_off00010a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4E 9928 bytes
SHA-256: f8abcb4024d72c3d43fe8278ec6ef8c3d71c899cbf7036af7413bb71d4fabe15
font_02_sfnt_off00012c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C40 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.