Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c42487f0b08636…

MALICIOUS

PDF

202.3 KB Created: 2021-04-03 18:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: eb07aed2b511f6d3111e318add85ae7a SHA-1: 3343ebc5aaf2ab05efbf542c647304577bf667dd SHA-256: a8c42487f0b08636e7f54ef55f3b52f4b861d597970c036e2a5ef4dc47194ea8
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain search terms that could be used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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://jacksth.ru/strik?utm_term=boy+scouts+uk+near+me+vancouver+wa PDF link annotation
    • https://pipefedib.weebly.com/uploads/1/3/1/3/131383483/2784572.pdfIn PDF document text
    • https://zizojatemizowen.weebly.com/uploads/1/3/4/0/134016780/saref.pdfIn PDF document text
    • https://momiweporav.weebly.com/uploads/1/3/4/7/134745900/1703376.pdfIn PDF document text
    • http://terakusinuw.mypressonline.com/national_interest_issue.pdfIn PDF document text
    • http://kesisofawa.mygamesonline.org/barriers_to_effective_business_communication.pdfIn PDF document text
    • https://liletizotefos.weebly.com/uploads/1/3/4/2/134234842/ruligixogasem_nafoliwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425913/normal_60538b1ddc5a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476437/normal_60149d973b172.pdfIn PDF document text
    • https://xewurilarigifu.weebly.com/uploads/1/3/4/2/134236076/nubakixepeju.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/sojivowud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_5fd634d7503d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418987/normal_600c9de72573a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473902/normal_605d9ab044d24.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://s3.amazonaws.com/wudibirewuduto/php_format_bytes_to_mb.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/what_is_the_best_gre_online_prep_course.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da4805b2-6522-49ac-ace7-813e1e818acc/midi_to_sheet_music_notation_software.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/how_to_find_slope_of_line_given_two_points.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d51a68-f175-4098-bd78-d9d4871645ca/52260893683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12c5efd9-03e0-477c-8e04-8b56ecf53885/33783200036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99f0bb3b-a327-4b57-8d02-8bd18c280453/42037644800.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/18522096076.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/45910785762.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/dufazulopag.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/dd_5e_madness_table.pdfIn PDF document text
    • http://wujagenak.atwebpages.com/94824855526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80ac938f-ebe0-4cb0-bfa8-81e4c08f19b8/himno_de_honduras_letra.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_off0002d588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D588 5112 bytes
SHA-256: 5ca0330912bea700f06176220ae168a8a95728771d05c1dd7496c84ae198e49e
font_01_sfnt_off0002e6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6E8 11024 bytes
SHA-256: 341e07aa09fabea337c3d172176eb872550cc1f4a464d2ee6d1347dec0619479
font_02_sfnt_off00030c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C7B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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