Malicious PDF — malware analysis report

Static analysis result for SHA-256 be03c6cfc4708871…

MALICIOUS

PDF

78.7 KB Created: 2021-03-12 02:58:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: edebf02315fa7fe295a157c2802272b3 SHA-1: 2bcd57def69b54ac2d7d65409b4ba65deefe14ce SHA-256: be03c6cfc47088714fcefe38c3d32d0dc42bb900f85fde78e454d085d7b8a86d
136 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers also indicated maliciousness. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' indicates the document uses an image lure to redirect users to a URL, likely for phishing or malware distribution. The primary malicious URL identified is https://seumenha.ru/aws?utm_term=d%2526d+5e+how+do+warlock+spell+slots+work.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/aws?utm_term=d%2526d+5e+how+do+warlock+spell+slots+work PDF link annotation
    • http://ins.expert/membrane_diffusion_lab_answer_key_phetjwk1z.pdfIn PDF document text
    • http://winoorama.fun/possessive_noun_worksheet_1st_grade9sfl0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420244/normal_5fc9a1d3b4b5a.pdfIn PDF document text
    • http://hardcreditcheck.info/16171242930zo887.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/56614065308f8npn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412761/normal_600670b0cea7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463300/normal_5fe15e520fe4a.pdfIn PDF document text
    • http://autoport76.online/reporting_requirements_for_medicare_and_medicaidp7agi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/xabizepebabuwitibazis.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/spotify_premium_offline_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3d24fbb-e4c0-44d2-b4ee-be3cf187d8fb/80430634312.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/fort_worth_police_department_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/xurimalogiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ebdff5-c9a9-433b-aa08-a32988233001/8733787830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b7da3f1-d6b3-4042-913a-0c390dbc9cdc/49440680946.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/rareriwukoxefogomej.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/como_aprender_ingles_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/uc_browser_for_iphone_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b30d372-a74a-48c8-b40c-416ace804c1e/32229690586.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/n_alphabet_wallpaper_stylish.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/linabuwutababi.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/3272765885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a02db9c1-deb9-45fc-b710-385aa3cddc78/zarononidozosiwozara.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/lactinex_chewable_tablets_drug_information.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/guide_dogs_for_the_blind_tv_advert.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_off0000ef38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF38 4156 bytes
SHA-256: 4137e011fb50e940388b7a91a31e36f70741d8ce55ef6fbc7fb0314564e06879
font_01_sfnt_off0000fd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD68 17440 bytes
SHA-256: fb463e674d019134ed763ea3716410a90dbf3fed5c5034f5e7ff353c85d0498f