Malicious PDF — malware analysis report

Static analysis result for SHA-256 c567888f60607678…

MALICIOUS

PDF

98.3 KB Created: 2021-03-20 05:35:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 77037cd17b21f8a6f72158c0abeac43c SHA-1: e5c1240a0e9fe66eee0ba04f5ecf09b7a0626dac SHA-256: c567888f606076783a404262a8adba853c081e435b0a4756f8f6a36c7ac58e95
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'ponafet.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'Adoniram Judson books', suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/award?keyword=adoniram+judson+books+pdf PDF link annotation
    • http://copyright-help-center.com/how_to_reset_wired_smoke_detectorsnjo4h.pdfIn PDF document text
    • http://chestlune.online/daoc_midgard_leveling_guiderxz8z.pdfIn PDF document text
    • https://povurumupun.weebly.com/uploads/1/3/4/8/134884194/wefulelixanutuf.pdfIn PDF document text
    • http://shopyou.online/cabotage_laws_of_the_worldj1dtt.pdfIn PDF document text
    • https://valezofijamope.weebly.com/uploads/1/3/4/4/134445284/4437515.pdfIn PDF document text
    • http://vorecan.space/15938200261tu656.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/beetalk_ios_2._3._6lih64.pdfIn PDF document text
    • http://tibudirowe.mygamesonline.org/34158203050.pdfIn PDF document text
    • http://copyrighthelpptteam.com/81860290094bbjza.pdfIn PDF document text
    • http://leadtop.co/tiwiwosufugegotwowlc.pdfIn PDF document text
    • http://libutulidux.medianewsonline.com/20145805389.pdfIn PDF document text
    • http://paselon.getenjoyment.net/wirufabavitazarixitina.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/149f68a7-a378-446a-aacc-86b9e03c5c88/21892973650.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/english_vocabulary_exercises_for_beginners_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a33aa5e-055b-44a0-8061-e853dd5bf283/wozewigidutinigunumasak.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/tikotupaku.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/pisarofawap.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/canon_mg2520_scanner_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/91547932753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7c692ea-b55a-49e2-95f3-cebed6c9b710/physics_for_scientists_and_engineers_serway_jewett_10th_edition.pdfIn PDF document text
    • http://punotonaduwize.atwebpages.com/54912407283.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_off00014149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14149 5424 bytes
SHA-256: 44c31863bf8145e55331143462bc9ce2160f3630723beb7009f860d55a649036
font_01_sfnt_off000153a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153A3 11244 bytes
SHA-256: 415815da225684b22d0fdb7c129da6dc0dc70349d9b0048f774d755ed4f93001

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