Malicious PDF — malware analysis report

Static analysis result for SHA-256 042a398f2a50b763…

MALICIOUS

PDF

73.0 KB Created: 2021-03-28 00:50:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a863797fc727f2e3634cc1c01661878f SHA-1: 5541e94e017a05ba7ec93980d3b58306aec8cbc6 SHA-256: 042a398f2a50b7637a32a5b301446fe4ceaba4d4e5b5af299042f2eddc47b857
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which are to link farms, suggesting a malicious intent to direct users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate malicious content, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure and numerous URLs point towards exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/123?utm_term=epson+l120+resetter+guide PDF link annotation
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://zubetotuduve.weebly.com/uploads/1/3/5/3/135340520/7550044.pdfIn PDF document text
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/9778919.pdfIn PDF document text
    • https://xejukosaxup.weebly.com/uploads/1/3/1/4/131437924/5840991.pdfIn PDF document text
    • http://biomanix.best/raluxisisizutoburesaf8r4d7.pdfIn PDF document text
    • https://majotowuwirup.weebly.com/uploads/1/3/5/3/135346036/vopezinadapubafoxi.pdfIn PDF document text
    • http://zesamoa.online/5336393592594b2n.pdfIn PDF document text
    • https://rebejudan.weebly.com/uploads/1/3/5/3/135316845/legizedaju-kuraloguze.pdfIn PDF document text
    • http://gachihyper.xyz/67598825761mse18.pdfIn PDF document text
    • http://sodaapp.club/15915058046i8cgf.pdfIn PDF document text
    • https://femulonatif.weebly.com/uploads/1/3/4/5/134501650/1ae1d714e256.pdfIn PDF document text
    • https://fuwivofopotafuj.weebly.com/uploads/1/3/5/3/135388640/4179569.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6cdb29d4-22ce-4aaf-9e51-562b59d50851.filesusr.com/ugd/1b20fb_4a52e6d4ff0c43e0aacd65dc665750cb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/angelo_s_soccer_corner_uniform_ordering.pdfIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_fc65a5927f894e14b9e63d126157ac0a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jipowumat/havre_montana_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/whats_your_sign_based_on_your_birthday.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/avakin_life_mod_2019_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/shankar_mahadevan_tamil_songs_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/movafapadovikesegalodus.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/browser_vpn_apkpure.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_off0000df96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF96 5200 bytes
SHA-256: 2ffdde4fa99e828e447f811ad363b3e21612cde085353aa0cd7887165bf409d6
font_01_sfnt_off0000f165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF165 10516 bytes
SHA-256: 3c1de806e63816b9490387a2c81c3c1f2b6faf7afa953b51dec3433cadc7ffe8

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