Malicious PDF — malware analysis report

Static analysis result for SHA-256 697e764d785d031f…

MALICIOUS

PDF

86.1 KB Created: 2021-03-14 05:01:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6b3a3630e86dbb7a0e47216be0d5da1 SHA-1: 735203a1bd2a9198952ec5ebfb60e77512ca0d3c SHA-256: 697e764d785d031fccd3fa5dffab3dc6788ecffadd654bdc5d1f9ab32ccf34a6
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. This suggests the primary purpose is to redirect users to potentially harmful websites, possibly for phishing or to download further malware. No scripts were extracted, but the presence of numerous external links is a strong indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/123?utm_term=classicismo+e+literatura+de+informa%25C3%25A7%25C3%25A3o
    • https://cdn-cms.f-static.net/uploads/4425921/normal_6037195b73d0e.pdf
    • http://odebayitrafikhizmeti.com/dogs_are_better_than_cats_essay_conclusionvfflx.pdf
    • http://safijejog.mygamesonline.org/21271486088.pdf
    • https://static.s123-cdn-static.com/uploads/4387037/normal_5ffd5999e6c98.pdf
    • http://1xbet-registrat.site/free_printable_grade_2_maths_worksheets_south_africark2w5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_ffe8ac21c46342709049b0632fbed01a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b983a81a-165f-4f9c-b1d5-0a35893bdaa5/mesine.pdf
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_0bdb6546aafc46228d5bd2634918a376.pdf?index=true
    • http://susabumo.atwebpages.com/which_cards_against_humanity_expansion_box_is_the_best.pdf
    • https://uploads.strikinglycdn.com/files/e6bd45df-e807-45b5-b5bd-3674acd5df41/cinemate_120_remote_codes.pdf
    • https://uploads.strikinglycdn.com/files/9b689e4d-178f-4217-9f33-7e4481fbda65/kimberle_crenshaw_mapping_the_margins_quotes.pdf
    • http://xesovukefezusag.rf.gd/forces_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/632dd317-99f5-46e8-b3e7-b938e4f859ca/the_lion_and_the_mouse_story_sequence.pdf
    • https://uploads.strikinglycdn.com/files/fb085609-ff7a-4352-b79e-9ad5dda7901c/sipud.pdf
    • https://a6132035-7465-4fe4-be4e-2faa96c22dab.filesusr.com/ugd/cf950b_3aebc044fb3c449684e5e5a8ab2b5fe9.pdf?index=true
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_cd5ebac4b9514bba9e55d7d151809ff0.pdf?index=true
    • http://fogaweja.epizy.com/70448679967.pdf
    • http://sabiwilurase.atwebpages.com/basic_computer_course_fees_in_bangalore.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ecc.bin
37dbc8e69e1a654741cdef5db77013f0c29532acb24e794263c13cbfe867757a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECC 5572 bytes
font_01_sfnt_off000120c7.bin
778a2f52266494dca37a9eb6a1503195a3e6648374532f160d2a9e615f2f49a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120C7 13440 bytes

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