Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a878ee97dd23a4…

MALICIOUS

PDF

142.3 KB Created: 2021-03-15 15:14:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: daa6ce8ac88f006c6f87d8543da57022 SHA-1: 9990091e8446b40e11a13f7521d2579fb7c711a6 SHA-256: 49a878ee97dd23a412f636274118eb15a666ec84d96703b1019182e62c7ff0b8
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized, suggesting a link farm or phishing attempt. The primary URL, 'https://maypoin.ru/award?keyword=luis+de+camoes+os+lusiadas+pdf', is likely a lure to a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, possibly related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9752

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/award?keyword=luis+de+camoes+os+lusiadas+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409257/normal_601b7d24e05b6.pdfIn PDF document text
    • http://datekal.22web.org/aimsun_user_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/jghhMfp/98891354903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408992/normal_5feaf3205c83f.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/o7gi9gd/earn_to_die_lite_hack_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422914/normal_604b734477dd3.pdfIn PDF document text
    • http://wiramegat.22web.org/bhagavad_gita_in_kannada_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/hdCdhj3/mevobuwapasexij.pdfIn PDF document text
    • http://kuroramogesok.iblogger.org/ultratech_im-_1270_datasheet.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/ljhtIVJ/8334583711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415534/normal_5fe66e86caee0.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/kudufigunabi/rigaranekamunugowosavegom.pdfIn PDF document text
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_d13b221ee5e5442fa1472b4c3e92d532.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/favamolasu.pdfIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_fbcde1f94fbc4063b69f56663b303022.pdf?index=trueIn PDF document text
    • http://xurorovesi.epizy.com/49931248809.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/46707180782.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/ww1_artillery_shell_case_markings.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/xizulod.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/wii_stuck_warning_health_safety_screen.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/sisojaj.pdfIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_7d1d9775ceae4cc6adbcad18c600d425.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gusule/nexutewuj.pdfIn PDF document text
    • https://c20a02f1-eded-46de-afbf-2d7328e03b26.filesusr.com/ugd/c6fd25_6ce4c7a1a2c2420d82acf38f57624068.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/samsung_tv_turns_on_but_no_picture_red_light_flashing.pdfIn PDF document text
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_c01d5962d9ba417f9785687767e3e788.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C9DA 4840 bytes
SHA-256: 429f811c24d10d728336272648135313cac9f48cfca7f51b9f4e6d816cbe62e6
font_01_sfnt_off0001da4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA4F 15300 bytes
SHA-256: ebe629bebfa110ea73232f3952d287301a536bd675780a262b6b4de8e0d5fbf7
font_02_sfnt_off00020917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20917 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f
font_03_sfnt_off00021d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21D81 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34