Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a9e6b1d9df48a7…

MALICIOUS

PDF

140.1 KB Created: 2021-03-16 17:42:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 364850c815fb8124f87dc22979da38b0 SHA-1: 7b6a229cac395a2cf443be5372f3c76d021ffa23 SHA-256: 45a9e6b1d9df48a7fa58f6590fab6de110a2c3c3cfcf4daadb61c9cc86ac92c9
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 a URL associated with phishing or malware distribution. The ML classifier and ClamAV also flagged this file as malicious. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/123?utm_term=calculus+early+transcendentals+7th+edition+online+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4496380/normal_601c5b7bcf387.pdfIn PDF document text
    • http://nnorm-id.com/pamobunugzq8q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452382/normal_602115f8c4902.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482869/normal_5ff3fd42ae2d5.pdfIn PDF document text
    • http://cardioactiveitalia.site/photoshop_cs6_portable_ubuntu11p2v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_604010344e603.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381532/normal_5fcdde285b83d.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/dhdijhd/megan_fox_transformers_3.pdfIn PDF document text
    • https://cdn.sqhk.co/vezubusevof/VcicZgh/xaruletazitajefut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486351/normal_5fc70a7c3d700.pdfIn PDF document text
    • https://cdn.sqhk.co/weralutofa/geh0fgf/how_to_play_poker_rdr2.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/vvrpige/oklahoma_state_football_coach_salary.pdfIn PDF document text
    • http://7lessons.fun/1862299282grxan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427528/normal_602734e36cf0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500453/normal_5fef14c054581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495686/normal_5fe832ae2e864.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404524/normal_5fc6465ce7976.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372985/normal_5ffff2799ca77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460243/normal_6033509faf63c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480735/normal_5fd66dce3c07f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493876/normal_5fdc30b697a8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/accb9d99-ea4e-44af-98c9-f0fed90200f1/46097796210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d0c142-d1e4-4e56-b893-99f80d3dbf85/the_walking_dead_graphic_novel_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c13537e3-3b06-4eb4-b77e-6012b4e373fd/does_mcdonalds_have_dairy_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1e8d586-2cea-4aff-a3f4-3981a1f30c90/how_to_hook_up_ilive_speaker_to_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6200bb07-23c6-4554-b1de-c06ed948311f/foripolotuxuvepexikigoja.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_off0001ebb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EBB4 5332 bytes
SHA-256: 9fbfdfe5d1e2fdee2040ce2b37afdf9e79d6c52bc60101f352c843d8d65055aa
font_01_sfnt_off0001fddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FDDC 10556 bytes
SHA-256: a62aed67260b41af5430d74ef6a7a77240eb9cf707de7278f5bcf8230975f14b