Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6a0b747be2143e…

MALICIOUS

PDF

98.4 KB Created: 2021-03-28 10:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9a42de2df274b568ef34c3d8916cd62d SHA-1: 580d77ec7bca1e3ad0898b9123575da5e38cc4b1 SHA-256: 3c6a0b747be2143e7bf1686cd490b1fb196d75901ea3cbff5587835c2d2f3339
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 domains and link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure for free downloads, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://soxebez.ru/award?keyword=bhagavad+gita+malayalam+pdf+free+download PDF link annotation
    • http://gaximivotekole.mypressonline.com/rekanosejujeje.pdfIn PDF document text
    • https://cdn.sqhk.co/bubuzibiv/gf8Cii0/fitbit_inspire_2_clip_heart_rate.pdfIn PDF document text
    • https://cdn.sqhk.co/ramawuvade/iLfV9yE/zakotabejavofulij.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/94392088178.pdfIn PDF document text
    • http://reduslim-officialsite.site/is_milk_bad_for_childrens_teeth068oi.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/Vhciege/jafefeloba.pdfIn PDF document text
    • http://mokemowowove.mygamesonline.org/how_to_activate_seven_chakras_in_human_body.pdfIn PDF document text
    • http://zagodutaf.getenjoyment.net/deficiencia_de_vitaminas_y_minerales_en_mexico.pdfIn PDF document text
    • http://erogan-columbia.site/how_to_adjust_pfister_shower_temperature8f5wm.pdfIn PDF document text
    • http://marafonsport.site/35356884132n0cw8.pdfIn PDF document text
    • http://takipibimaxubov.sportsontheweb.net/samojakefozeketikabuwuj.pdfIn PDF document text
    • http://xuroriwonufuz.scienceontheweb.net/90030670264.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_ce4e07f6bb7c476197868ad81a20d7ab.pdf?index=trueIn PDF document text
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_f581de48206541e0817756f30081c162.pdf?index=trueIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_a6e1cb2c627c4f52b60cb2d26d19108c.pdf?index=trueIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_44803e7893ba4f6487dffe5a7d6f610a.pdf?index=trueIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/wofakakisuvaravorobivazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19789b5f-1117-40f6-875b-51caf76ce8a5/mikovukipesedetut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad3a6f34-6c0b-4c8e-a5a5-ead89e2cb205/benixofemumemekifedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed701b2-8a49-43ae-bf9f-9d520f3295ac/wezerisamafafolanorila.pdfIn PDF document text
    • http://xutenasejubibe.atwebpages.com/autoestima_tipos.pdfIn PDF document text
    • http://feferabi.atwebpages.com/applied_mathematics_msbte.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/552e6d8d-7792-405c-84ca-55fd13fa9536/netgear_wnr2000v4_openwrt.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e72d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72D 5580 bytes
SHA-256: 9218dc25743cb8092fd958c697ced23edcdfdec63d0fda22952218a3c15ba19f
font_01_sfnt_off0000fa19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA19 32640 bytes
SHA-256: 3535f320107ddf3b99c45b7c7d09abb500360c6bd88480d62d0ec25d97bdfbc8
font_02_sfnt_off00015388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15388 11012 bytes
SHA-256: 94c8aef01bd08e3a87f899953e5ea05b14c9838aa97f1d29523a6bd2a3690ef9