Malicious PDF — malware analysis report

Static analysis result for SHA-256 add7959d219ab900…

MALICIOUS

PDF

134.6 KB Created: 2021-03-16 15:30:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 29aae17ad79fd7ab69e168a92cb97432 SHA-1: da2eebd30ab10cb94bb9a9706a62f63156714012 SHA-256: add7959d219ab9001c0c0909daf7dd1b4eca3382131f1f1968c61ba944d439e2
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a site offering a 'ccna networking course syllabus pdf', which is a common lure for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further suggesting malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score strongly indicate a malicious phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/award?keyword=ccna+networking+course+syllabus+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496571/normal_5fd98c52cb092.pdfIn PDF document text
    • http://iuts.space/ridolitapofoxotawavild04p4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371240/normal_5ffd7cdd89b61.pdfIn PDF document text
    • http://termometr-medikal.site/galaxy_battle_gamez3xqj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482399/normal_603c82f8e39a4.pdfIn PDF document text
    • http://levelupguild.com/tisefegenorizowozafunu9cfcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485828/normal_601f64dab23d8.pdfIn PDF document text
    • http://wiwusigeronisu.66ghz.com/cookie_butter_nutrition_information.pdfIn PDF document text
    • http://martakkord.ru/lenaduwugqkylm.pdfIn PDF document text
    • http://dimax.website/color_bump_3d_online_unblocked8h2by.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muxegeza/kaspersky_antivirus_for_pc_offline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7661674-a776-4d50-9471-3d7a9120d984/can_you_make_bread_in_a_bread_machine_with_all_purpose_flour.pdfIn PDF document text
    • http://rujujarorimepa.rf.gd/futopos.pdfIn PDF document text
    • http://dolipefutulej.epizy.com/akshara_song_badhai_ho_badhai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c83af99d-b7e2-46d9-be61-6064f93a02b2/fundamentals_of_engineering_thermodynamics_9th_edition_free.pdfIn PDF document text
    • http://muparokaxewidad.rf.gd/diluje.pdfIn PDF document text
    • http://lobosenus.epizy.com/strategic_communication_template_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/annual_report_2018.pdfIn PDF document text
    • http://kubatejabudebuj.rf.gd/fikomunoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7221ca4-f6cc-44ae-b8ba-cfacaeb91d16/85214697845.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/fluke_87_v_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d2b18f-f694-44d8-b8b8-9460f65413ec/mary_poppins_returns_songs_in_order.pdfIn PDF document text
    • http://zenowalu.rf.gd/51420661273.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A080 6568 bytes
SHA-256: 792e288023e4fbe73a0351c4e4cf94c19217598e688914c0413f09f13c1160d5
font_01_sfnt_off0001b0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0CD 5628 bytes
SHA-256: fc2920557a6b4cf642c1fc48b4ccb3069fd1bac6aba27f76a0e0e05c08d65b62
font_02_sfnt_off0001c40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C40B 2132 bytes
SHA-256: 065f2abfb6bf82b1afde6bfb4cfa224dfadc3c5d80a67096a22c7f2da70928c5
font_03_sfnt_off0001ce08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE08 11548 bytes
SHA-256: c86dc783b6642e914713d9a3b9fcc7c4a444de167dc6e099806e0b6cf636e8c6
font_04_sfnt_off0001f595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F595 16236 bytes
SHA-256: 01934bae5a76374c558b256b5a999434f84d06e0733bd05e430fdbd575094919

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