Malicious PDF — malware analysis report

Static analysis result for SHA-256 e221012cef461db0…

MALICIOUS

PDF

78.7 KB Created: 2021-04-28 09:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8188e5743750adc20b5bacdb542d3abc SHA-1: 12dc75a8b4aaf45815d197fb33a868d232d6c510 SHA-256: e221012cef461db0513aba221f3648a398448d85ff75cd2100fdbf8635ac71a1
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to disposable domains and are used in a link farm pattern. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'CCNA self-study lab manual guide PDF', directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=ccna+200-125+self-study+lab+manual+guide+pdf PDF link annotation
    • https://cdn.sqhk.co/risafapiven/hajcjfF/caswell_county_gis.pdfIn PDF document text
    • http://ing-cliente.com/bicol_tagalog_dictionaryd5ggf.pdfIn PDF document text
    • http://copytoshka.ru/do_prince_caspian_and_susan_get_married7o66r.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/Ijj7gfJ/hoplite_helmet_tattoo.pdfIn PDF document text
    • http://kismykeitio.best/bonabexokebevodie648b.pdfIn PDF document text
    • https://jenodefutufute.weebly.com/uploads/1/3/4/3/134373351/20c62eb0f91e64e.pdfIn PDF document text
    • https://posolefuriw.weebly.com/uploads/1/3/4/3/134374222/b9406fff17ca4ad.pdfIn PDF document text
    • https://sigogaxeba.weebly.com/uploads/1/3/4/6/134620414/aeb4c09.pdfIn PDF document text
    • https://cdn.sqhk.co/rudugebakivo/jbA01jb/zovobaxalegifaxu.pdfIn PDF document text
    • http://nasty666.space/lemony_snicket_the_composer_is_deada51oo.pdfIn PDF document text
    • https://suwesinorilofev.weebly.com/uploads/1/3/4/0/134096988/1592421.pdfIn PDF document text
    • http://xekugesakurupab.22web.org/chiasmus_is_a_form_of.pdfIn PDF document text
    • http://item-mask.top/fathers_and_sons_hemingwaydoks8.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/fakuguvil/86602553939.pdfIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_ac5f110b53a34f94afdd3a95e98804cf.pdf?index=trueIn PDF document text
    • http://zafurug.epizy.com/citroen_c4_pallas_manual__bom.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/iba_guidelines_arbitration_independence.pdfIn PDF document text
    • https://6cda4dd4-8aac-43e7-8003-7c0eea9f7907.filesusr.com/ugd/34e26e_09456ddfdda4432ca6e68933f8d239f2.pdf?index=trueIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_e82f3c84b22e4e49a42c59233223258f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/volkswagen_service_center_brooklyn.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/visopukabogijelit.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/definition_of_sustainability.pdfIn PDF document text
    • https://3437305d-a3f4-4f94-9a63-846dd410f5be.filesusr.com/ugd/ffe76b_7a72bb73516a42b8a86aac6462dec2ac.pdf?index=trueIn 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_off0000f127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF127 6008 bytes
SHA-256: 2bdda94be0d19820db9f6a28a5c23ea97a4fd2f4a09899d50103270a105ce0aa
font_01_sfnt_off0001059f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059F 11716 bytes
SHA-256: 22a29f0aa8cf569efc70943358bfeab0d24c39acbf23cc246dfe2c2b45be9fd4

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