Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa19966a5601099…

MALICIOUS

PDF

137.9 KB Created: 2021-03-20 22:53:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: acfc5d8bc7e84cb4a893b4042b1e6cda SHA-1: 7785e846412a24a27eda27314a0a428fb5ccad58 SHA-256: 2fa19966a56010991c827396038a70ef7793ce976fb0dfd8b8fb5f96740c517d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to awards and social problems, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/award?keyword=bullying+problema+social+pdf PDF link annotation
    • https://ganokupojedozo.weebly.com/uploads/1/3/4/8/134890080/3187e88bafb5.pdfIn PDF document text
    • http://vedovipog.22web.org/96644219531.pdfIn PDF document text
    • https://cdn.sqhk.co/pugijuzo/VyIjjif/chhota_ninja_city_runes.pdfIn PDF document text
    • https://palobakuk.weebly.com/uploads/1/3/4/5/134523632/c56241f0c.pdfIn PDF document text
    • https://xefapakofaguwa.weebly.com/uploads/1/3/1/1/131164324/fosewised_nezoduje_goratuvavuvi.pdfIn PDF document text
    • https://jipaxebuperiw.weebly.com/uploads/1/3/4/7/134751602/16b2388591c55aa.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/gihhCig/bottle_jump_online.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetijesi/jjbjjjb/6676245879.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/jccyLih/fanuc_cnc_lathe_simulator_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jerovewoxisabu.epizy.com/tristana_guide_lolking.pdfIn PDF document text
    • http://suwutosu.epizy.com/25633956688.pdfIn PDF document text
    • http://fesononojowa.epizy.com/calcutta_university_question_papers_b._com_1st_year.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d4ee6c-51d8-4d5a-a891-17714a6c0b58/judawa.pdfIn PDF document text
    • http://tuxigufujera.rf.gd/zazajinejilabunilu.pdfIn PDF document text
    • http://sixosotonipo.epizy.com/81918476466.pdfIn PDF document text
    • https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_9b73fe4825564c23b93db4a46908279f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/efe0341c-cd2d-4f43-a027-1421fb1d63f0/90893406590.pdfIn PDF document text
    • https://7737876a-f762-42ef-af6f-18b78abacabf.filesusr.com/ugd/9066bd_43e409eabfc84768a8c210a26bea7ed8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c859ad6d-08de-4702-9d4e-b7a61cfb2c56/duzitabasip.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_off0001dad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DAD5 5768 bytes
SHA-256: 9df51a3aeb12eca72dfde5e741d631cdb839f202694fa57b2ee88eab05dc386e
font_01_sfnt_off0001ee69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE69 14196 bytes
SHA-256: c404231e2d86c7a80b2595366f336a3ea9c987e7cdf53d39e0c7da5f6d3a717c

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