Malicious PDF — malware analysis report

Static analysis result for SHA-256 19cf7519ee3a8642…

MALICIOUS

PDF

73.8 KB Created: 2021-06-05 01:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bc1653e36a140ccee8cff5bf3c1d4a27 SHA-1: b0972ba6ec7fff13a1d91a19d9291c7c73c33752 SHA-256: 19cf7519ee3a8642125c23146cd5159dad0ec5b7716ff95bebdac6a0ee72bd4a
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://krisoc.ru/pbw?utm_term=how+to+make+full+body+massage PDF link annotation
    • https://sapilijufidukuw.weebly.com/uploads/1/3/4/9/134901451/9541cde930.pdfIn PDF document text
    • https://vomuzubedabop.weebly.com/uploads/1/3/0/9/130969103/fatajegotekexa.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4378608/normal_60b4a7739eec5.pdfIn PDF document text
    • https://xavexipaw.weebly.com/uploads/1/3/1/6/131636683/manoxonu-xiluxego-ginudupixenex-zetezini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497666/normal_6056f4ac49aa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455180/normal_601d51342d1b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401691/normal_5fcc29e50019d.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/355b8394-fe2b-4597-a055-ea4dfff85316/saxumezenefonabumotadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ae6420-780b-40e3-90ee-a1e53e6a9446/zatafaburenumap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1f9ec7-2dd0-4cf8-8423-8105473ceeb2/mivud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0279928-4c0f-490d-9745-162969689ff4/2010_lexus_rx_350_for_sale_atlanta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c63fd6-15eb-4b77-8ff7-4d8f56cf493e/how_to_joint_wood_with_a_router.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c61b9aec-2290-4a15-846d-941410e97e52/zupogubopam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8f616cf-b754-4bc9-a56a-67c011828551/how_to_put_iphone_4s_in_dfu_mode_without_home_button.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ca243b-50cb-4a6b-bfdc-e83a18941669/what_is_chapter_1_of_the_giver_about.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed8bbb37-757a-4516-912b-faf4f2f67130/the_power_of_positive_thinking_in_tamil_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e736463-ce9f-409c-8a91-cf708151bac5/6799919417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da1a2f03-0747-487b-8bfb-9470bcb76773/how_to_make_an_expense_report_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd5be114-0e2f-44e0-bdec-8542d7aeed97/how_long_does_a_homeless_person_live.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5819710c-99ed-4921-923c-7cc501e53aac/arundhati_full_movie_in_tamil_hd_download_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68035e38-85f8-4b6e-8982-07d25ace4580/what_is_the_default_username_and_password_for_oracle_11g.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76bc56b9-a0dc-4850-887a-745c1472abad/famugevaturegesajokede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d8da428-84c2-4cbe-816c-9bc1e13462a9/which_baofeng_radio_should_i_get.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0e779c-48a4-4fac-b6ff-43df1418f1ef/gojosakisunijopopaxaduv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/215933a9-4c43-4ca1-83b0-09ceb6fc264c/printable_quadax_julian_calendar_2020.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_off0000e0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F1 5488 bytes
SHA-256: 6aa3c4e29a216e7c3d01ffb33129c00d3aaa7db1c90b296416c527360b1af25c
font_01_sfnt_off0000f3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A7 10764 bytes
SHA-256: 1de0e9883062f400bdee11f860360c31a30cae7a1b30787ed434902e12c44a1b