Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ee56bf349105bc…

MALICIOUS

PDF

82.9 KB Created: 2021-03-09 19:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5eda785a522f1d4cc0ccfafac66dc490 SHA-1: dc81bbceb846458118c2d088fce99ae3ef777361 SHA-256: a5ee56bf349105bc76b6a3cf7d216a466880d57594e7e2889303ad44a9e8df63
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://dafemum.ru/award?keyword=meio+ambiente+de+trabalho+pdf'. This URL is the primary indicator of malicious intent, suggesting a phishing or malware delivery attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient to indicate a malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/award?keyword=meio+ambiente+de+trabalho+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4413696/normal_5feb4f7b6796f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413845/normal_6039fb8e98e1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484815/normal_600f577bc9ff8.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/sigobija/3_inch_alphabet_template_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/keronosimovegora.pdfIn PDF document text
    • http://limazajot.rf.gd/905944276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d7b60c-48d9-484a-aadd-47a4f5d1b358/is_the_anarchist_library_down.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fd801a6-e8b4-4dea-9b48-ffae5785b17a/19226669739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e47d4fd-e556-4cb9-9735-8b91e75e760e/nojizukonusujej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64331627-365f-4bc4-ac26-e77e503b6e54/what_are_dork_diaries_books_about.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0aeac02-6e48-4bc2-9a9d-8c87477896d2/bad_words_in_arabic_to_english.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/how_much_is_a_ruud_furnace.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/guided_reading_books_for_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/the_binding_of_isaac_rebirth_igg.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/64796500741.pdfIn PDF document text
    • http://jexaziled.rf.gd/xajuleladagedivo.pdfIn PDF document text
    • http://nijetazum.epizy.com/vulaseruwa.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/bible_verses_in_english_free.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/fadezerije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ef62f4b-818b-4565-987b-e1f8fecd5e7c/37126451624.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/18036266998.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_off0001050e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050E 5248 bytes
SHA-256: 52605a58034760e9d06a6393990ab636d3e63fba07a4ca06564a6458f18c23cf
font_01_sfnt_off000116be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BE 12488 bytes
SHA-256: 3bd50567a24a6932034a6b43df68878a0724d0e224365dc4b9aa4bed7372fd74

Open this report in the interactive analyzer, or submit your own file for analysis.