Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0309555104abee1…

MALICIOUS

PDF

87.6 KB Created: 2020-12-03 19:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ae37f80c3f4397d91a72b182a926dc53 SHA-1: c62d27817d4567bf46719b09e3a29415d3b316b7 SHA-256: f0309555104abee15401dd729101e3aad19e68b57b5bb40094c1de1101513e77
214 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://gettraff.ru/123?utm_term=2+samuel+21+nasb'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links. ClamAV also detected it as 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the ML classifier's high score further support its malicious nature, likely as a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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.
  • 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://gettraff.ru/123?utm_term=2+samuel+21+nasb In PDF document text
    • https://mimudokax.weebly.com/uploads/1/3/4/7/134742140/mexoropiviviwu.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://static1.squarespace.com/static/5fc287be084698658e68a4f0/t/5fc4d83c9d79364840267256/1606735932308/jaxebodavotubilugedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9225df31-0130-4b3f-be87-628f05bf6c16/college_application_deadlines_2016-2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc19e291452f90b7fea6729/t/5fc7f6532378f85c1125b119/1606940244268/32379779087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd544f39-d0d5-46c2-9971-fde03b0abb04/kufunidomoda.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf514d6457125654316074/1606373710339/elf_on_the_shelf_welcome_letter.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4fb9145a8629dca78494/1606373306567/vixabunukolepumapivevewin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d67b8ef7301f8b106140/t/5fc4873d3570fb44d193f4b4/1606715202958/craigslist_nashville_tennessee_motorcycles_for_sale_by_owner.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc100ee92c50b1a1e781c95/t/5fc77529a3696915e2264b7a/1606907177969/homemade_indoor_ant_killer_spray.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc724bad64a3343a5f7119e/t/5fc8d0d4f97c193540f8bb2d/1606996180706/wenigelifiluvavokatuze.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc394550a2757459bf3c614/t/5fc4ba24f8cdb769c6787cad/1606728229110/a_field_guide_to_awkward_silences_review.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55adea13a450bab12175e/t/5fc688a708845d09246e5086/1606846632131/johnny_bracket_racer_ezell.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dbca2e537a05ef08df7c/t/5fc21eb4f81c9a2a0cea0a38/1606557365874/bilonewabanomar.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
    • 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_off0000f76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76D 4608 bytes
SHA-256: 2df4aa203dff60b7b6ffbcd4af29279297046070713fe338f7c9d08756f5ea81
font_01_sfnt_off000106ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EA 11032 bytes
SHA-256: ee212a44ed84e126c493d8ac7947ca339b3e3b39566a07f11bfbf9003ab35677
font_02_sfnt_off00012ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCB 16096 bytes
SHA-256: 8eec8a86e9713043d453ee78b6f9ec233d3b3648fadce6f12b77cbef3ce9fbce
font_03_sfnt_off0001418d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1418D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e