Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00ebf74a06bff77…

MALICIOUS

PDF

78.1 KB Created: 2021-03-24 18:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c8d348af1010e016d887a2ce45d36166 SHA-1: 4cd60b633bae645cb4df46dee29e410a93c81d4b SHA-256: a00ebf74a06bff77ca9c2829f439db949f32d9106ad896f6d8bb0232c37bf7f7
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm on disposable hosting. The embedded URL 'https://seumenha.ru/award?keyword=number+line+pdf+integers' suggests a phishing or SEO-based lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest an attempt to redirect users to malicious or deceptive content, likely as part of a phishing campaign.

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://seumenha.ru/award?keyword=number+line+pdf+integers PDF link annotation
    • http://mutinujevax.22web.org/google_sheets_excel_android.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
    • http://pijiwir.rf.gd/muwijosajapaxufesatu.pdfIn PDF document text
    • http://xunevonobi.epizy.com/auto_trans_to_manual_swap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b80693-9539-4b46-8644-4d2556a1ad99/10893504823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66c474f3-1841-4bfb-b639-f3c651b71e0c/learning_processing_a_beginners_guide_to_programming_images_animation_and_interaction.pdfIn PDF document text
    • http://moliposapivar.epizy.com/7025067391.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/xobepipumafavodizodafasu.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/extremely_hard_riddles_for_adults_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/fetevimex.pdfIn PDF document text
    • http://batuzotunar.rf.gd/kick_boxing_games_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/lizojavonikafobi.pdfIn PDF document text
    • http://samanoniminowut.epizy.com/nasew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad2abd27-1bce-44c7-a1ee-2bd1b6fa6256/singer_futura_xl-580_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12c597dd-29e1-4b37-a692-8ab505c9c27b/theory_of_relativity_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bedaed2-1b5c-4612-88ad-aa374f431731/building_android_apps_with_html_css_and_javascript_2nd_edition.pdfIn PDF document text
    • http://vabopegimunufet.rf.gd/44557904205.pdfIn PDF document text
    • http://sidegiri.epizy.com/niv_bible_with_bookmarks_free.pdfIn PDF document text
    • http://notijopozij.epizy.com/76596071292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a12ed89-c445-4c36-b5ea-ccf0b9e55b7a/what_reading_level_is_the_wonderful_wizard_of_oz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/858becb9-019e-4c94-98c2-249494606ee8/fukosamezuxadelepebim.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/22490577872.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_off0000e51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51A 5032 bytes
SHA-256: 271140be1a539e23481e350bf398fa9b8ba5f02bdc4d689686febc5eb92900a0
font_01_sfnt_off0000f616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF616 11388 bytes
SHA-256: 9b88dadee410f0b3e3677edf88d5f6ab6ea3d2a98be638b33c6998c27ccd3cb0
font_02_sfnt_off00011d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D07 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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