Malicious PDF — malware analysis report

Static analysis result for SHA-256 59adc8e04ee0ad77…

MALICIOUS

PDF

73.6 KB Created: 2021-03-01 05:25:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ba9480c3603490c92031273ce16c8a80 SHA-1: 9646016cb93889f5bac7bfeef54094b9ac1cd326 SHA-256: 59adc8e04ee0ad77e5f0cefe3f6b247de2e59ac0d68ec5d3c0ad788c5fef60fa
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain text related to 'drivers license testing sites', suggesting a lure for phishing or credential harvesting. No scripts were extracted, but the primary attack vector appears to be directing users to malicious external sites.

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/award?keyword=ok+drivers+license+testing+sites In PDF document text
    • https://bunosepe.weebly.com/uploads/1/3/1/3/131379858/6921961.pdfIn PDF document text
    • https://cdn.sqhk.co/litonesi/phghbhj/87638702056.pdfIn PDF document text
    • https://zaxewunatomilar.weebly.com/uploads/1/3/4/1/134131499/9601962.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481406/normal_5ff3b6743ed33.pdfIn PDF document text
    • http://blockingscenery.com/palintest_pooltest_9_premier_manualiw07x.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/hdUPNhc/ice_cream._places_near_me.pdfIn PDF document text
    • http://bred-enligne.com/why_is_the_water_not_working_on_my_samsung_fridge2gobv.pdfIn PDF document text
    • https://neranoliva.weebly.com/uploads/1/3/4/2/134266014/wazomumi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_603c4efc96e4e.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/4fd8fb69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425514/normal_5fc73108c13df.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/dikobepibelun/tagojabetagetekuxapod.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/provisions_of_compliance_audit_guidelines_of_cag.pdfIn PDF document text
    • http://wukezuzuxu.epizy.com/1000_songs_everyone_must_hear_before_you_die_list.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/kezumokewafuwoxagegimuvez.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_off0000e162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE162 5048 bytes
SHA-256: c95dfff4f4eb40658b2746553b7138720dba81334cc99066d9ed0094f7b34f6c
font_01_sfnt_off0000f2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AE 12364 bytes
SHA-256: 3e5af2d46eac4f027e41fc7b899e0b0979777b2f886e1ff74b23ed0310326e38

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