Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec5d66f673aee6e…

MALICIOUS

PDF

75.3 KB Created: 2021-02-24 06:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c5c0ae1cc08a4038e6991bf12402ca8d SHA-1: f65ebfdda54614d213b5caafb5cc78b405b1baa2 SHA-256: fec5d66f673aee6eb6fe48946cd1f143723368fd8e743ec73c3212a46dbe9bfa
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to unknown or potentially malicious domains, indicative of a link farm or phishing attempt. ClamAV and ML classifiers strongly flag this as malicious, specifically as a phishing trojan. The presence of embedded URLs and the PDF structure suggest an attempt to redirect users to malicious content, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://seumenha.ru/123?utm_term=appointment+in+samarra+questions+and+answers+pdf PDF link annotation
    • http://pitushok.fun/what_is_the_ufc_weight_classesyj548.pdfIn PDF document text
    • http://uggi-ugg.com/el_principio_del_placer_libro_completo_gratisc42p5.pdfIn PDF document text
    • https://midejewafefo.weebly.com/uploads/1/3/4/0/134000268/9275334.pdfIn PDF document text
    • http://lestyprin.online/super_bomberman_2_snes_instructionsju62d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447436/normal_602963619ed57.pdfIn PDF document text
    • http://zunowugijose.22web.org/informal_report_topics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427793/normal_6009d1d06d93a.pdfIn PDF document text
    • https://gakosokilexavum.weebly.com/uploads/1/3/2/6/132695298/89656151408.pdfIn PDF document text
    • https://cdn.sqhk.co/mudonisogub/gM7DiSJ/xofumes.pdfIn PDF document text
    • http://begemot.space/vefapexamilewajuvujaxbqg5.pdfIn PDF document text
    • http://wugobolemisezam.22web.org/atma_bandhuvu_movie_songs.pdfIn PDF document text
    • http://bahis-sikayet.com/2018_honda_cr_v_touring_owners_manual1lzq3.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/hSjbigI/auralux_constellations_full_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxegejedak/hZGjau4/ninja_turtles_legends_apk_offline.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/sivanira/sheet_metal_gusset_example.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/97071970788.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/cpp_extern_template_class.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/mukatukom.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/58054575210.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_off0000eaed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAED 5360 bytes
SHA-256: 89a52bfafbb51edce39377c54297a381cae52796ed1d203948bd7ab110238d3c
font_01_sfnt_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 10284 bytes
SHA-256: e0d254dcf6de937ee19e7601099b41560dfbddadaf515eacb08416ad137e1428

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