Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fcfae6f46b0922…

MALICIOUS

PDF

81.9 KB Created: 2021-03-08 06:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51764fbc5461c8aa282ffaafda9d1612 SHA-1: 19918d9465b5dcfcbcc5f5088a3fc758f63d4185 SHA-256: 01fcfae6f46b09224dbe8554a4f520a07854e9f3539fead746a37bb054384130
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to potentially malicious domains, suggesting a link farm or phishing lure. The PDF's structure and embedded URIs indicate an attempt to redirect users to external content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/wix?keyword=endgame+dvd+release+nz
    • https://mejotozoferu.weebly.com/uploads/1/3/4/8/134866749/jafovu.pdf
    • http://20970907.net/83881675330l1e1k.pdf
    • https://febelozo.weebly.com/uploads/1/3/4/5/134599394/8271094.pdf
    • https://cdn.sqhk.co/gebitasixa/hdTtigH/34171740531.pdf
    • http://on-arenas.com/47146570395hs5wv.pdf
    • http://kittyplay.online/domosatumapugebewonijumefxwunj.pdf
    • http://tupaxeguna.scienceontheweb.net/62079654080.pdf
    • https://static.s123-cdn-static.com/uploads/4369146/normal_5ff0e83005788.pdf
    • http://dfahsdfgjsfg.online/tsp_table_tennis_blades_for_sale1r0tt.pdf
    • https://kuzuvofaneze.weebly.com/uploads/1/3/5/3/135394893/fukepoxumi_sewak_lepumixufuxukan_jajixakipozali.pdf
    • https://cdn-cms.f-static.net/uploads/4372382/normal_6011312e540a6.pdf
    • https://sujolatako.weebly.com/uploads/1/3/4/6/134624807/vuwewanebuxekagu.pdf
    • https://cdn.sqhk.co/sojejinof/gllijjb/super_mario_world_all_switch_palaces.pdf
    • http://tafugegajotu.mygamesonline.org/firex_hardwired_smoke_detector_installation.pdf
    • http://pupezawat.scienceontheweb.net/do_you_get_holiday_pay_on_leave_of_absence.pdf
    • https://cdn.sqhk.co/sejujona/gjjit3y/xozowisegewo.pdf
    • http://dvertsoff.ru/c_array._indexof_performance7f4i7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6ce95562-7558-49ee-a7b0-b3003db3b0e9.filesusr.com/ugd/d13e1f_f672e495c28947568fead4401cf47fc9.pdf?index=true
    • http://kepagewav.atwebpages.com/83507733058.pdf
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_3c4c2daebb1041fca7706c6850a9c158.pdf?index=true
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_e1c30e3ca1634e96847f810fb0321254.pdf?index=true
    • http://xinifaduzinuvu.onlinewebshop.net/63332942247.pdf
    • https://4192d618-ecd7-4808-8485-efd4d6773ded.filesusr.com/ugd/17a5db_4c83db6d5394449c9606162800ceab86.pdf?index=true
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_51f2fa5a621641ada85b79baf70d77d9.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010546.bin
d8ed1c50f9fd4ed448e8cb62b79e22d2f70545a3249ada56f412780cc5c221d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10546 5212 bytes
font_01_sfnt_off000116fe.bin
b2d72fc5b57ba695299fd88e3484963453479ebfce83b3a03372f7b8ebe3a773		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116FE 10212 bytes

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