Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a19ed51a7b8ee4…

MALICIOUS

PDF

67.4 KB Created: 2021-02-24 09:39:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 05bb9cfbc2feb9e75aa1453ad94e81a8 SHA-1: fe75d8ffeaf4937e207592de9c07561ea174a32b SHA-256: 59a19ed51a7b8ee473068d30149d3b35d5bd25bc1aa18b7c4fc34feb136596e7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body appears to be obfuscated or corrupted, but the presence of links to suspicious domains like crophysi.ru and feliruxitekul.epizy.com is a clear indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://crophysi.ru/wix?keyword=2009+ford+ranger+owners+manual In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369493/normal_5fe560d02270d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480755/normal_6011cd4135966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500692/normal_5fd8423f55ca8.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/gdhe8jb/child_care_services_lubbock.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/icTjiie/jadiwisomemanomimeriri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445116/normal_60281e4c3ac92.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/jis3WbD/edit_player_potential_fifa_19.pdfIn PDF document text
    • http://opt05.ru/jko_combating_trafficking_in_persons_pretest_answersumaz4.pdfIn PDF document text
    • https://cdn.sqhk.co/kedilexele/wge2tid/35725913443.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/jejfhaG/fifa_football_2020_game_download.pdfIn PDF document text
    • http://fopijuzege.22web.org/lonipawumolijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405929/normal_5fdba195efea9.pdfIn PDF document text
    • http://topshops.website/drawing_human_anatomy9dljb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_602b647c2f92a.pdfIn PDF document text
    • http://futup.ru/fumamisohdcxc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374359/normal_5fd3d1f42c31b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feliruxitekul.epizy.com/13232375312.pdfIn PDF document text
    • http://movetodosewa.rf.gd/is_trench_11_based_on_a_true_story.pdfIn PDF document text
    • http://wilemibum.rf.gd/21128669670.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_off0000cb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB78 5652 bytes
SHA-256: f7e6c8d7984d2d3c73ea513032e23b667a9e1a24905a5b56cddfc664ab916e03
font_01_sfnt_off0000deaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAA 9936 bytes
SHA-256: b6034aaa54eb3577309860b6b4ea12ff3d64a73192563f845a9c9b92ca29ebe0

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