Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ce9770a1306826…

MALICIOUS

PDF

71.4 KB Created: 2021-03-07 16:00:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cfe30341d28fba6f6a982547030ed814 SHA-1: 20dc14bedf9f3fed8d3d0236bfd34655bd5aed51 SHA-256: e5ce9770a13068264b725cde3ed65dd631f1c02fe9129dbb4222a3b6d070c9e3
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to potentially malicious domains, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' firings. The document body is heavily obfuscated, but the presence of external URIs suggests an attempt to redirect the user to malicious content. No scripts were extracted, but the overall structure and URL findings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/award?keyword=accu-chek+compact+plus+kit PDF link annotation
    • http://senenetikoxikom.22web.org/android_9_easter_egg_samsung_s10.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/sesazejaligogela.pdfIn PDF document text
    • http://nuvagefo.medianewsonline.com/2006_honda_civic_ex_coupe_review.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/ZjhjQid/subijejedulemodub.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/half_ironman_training_plan_6_months.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/gjNgfhf/resajo.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/yoga_poses_for_weight_loss_step_by_step.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/182jiKF/coffin_dance_meme_roblox_id_code.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/fZickTz/bobozej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nisetekotixob.myartsonline.com/le_petit_prince_film_danimation_franais_complet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9bc2790-7157-41ac-afd9-f8e1c6110427/pujul.pdfIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_885bcb6d40b6417cbd67685819ff60e7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/31322c76-d833-4689-aef6-47666940f776/mudamanuwer.pdfIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_fb8b09107f7a4b1894ff51d41fbaa754.pdf?index=trueIn PDF document text
    • https://484a0fbd-04e0-416f-b335-41eb3f66808b.filesusr.com/ugd/228afb_329b5ded23464659966fa4f366b9f3dd.pdf?index=trueIn PDF document text
    • http://fajazimigig.atwebpages.com/3320576126.pdfIn PDF document text
    • http://kimoviranonaf.onlinewebshop.net/fewojawedu.pdfIn PDF document text
    • http://melamodusede.rf.gd/jikidux.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_off0000d7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E4 5160 bytes
SHA-256: dfc7b3bcb06b62589da22d1b34b55450dadc65df64fbcf30f85f57eb28edc820
font_01_sfnt_off0000e94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94E 11960 bytes
SHA-256: db05aa4efec3a9ba8f55f9c8861f8626a452632fcc18a96787f75f8cbc2eca78

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