Malicious PDF — malware analysis report

Static analysis result for SHA-256 065ec9e5eeb8b307…

MALICIOUS

PDF

71.8 KB Created: 2020-11-23 07:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed882696ed55e1fc5882414c062514ab SHA-1: 1146d98e943db8fd918a8cf07dbbf0e58fb782ab SHA-256: 065ec9e5eeb8b307b227b5fd51f94b515f23957d80ce26f5101aae4728c2c13b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it's part of a link farm designed to manipulate search engine results. It also contains an external URI pointing to a suspicious domain, likely intended to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

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 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://trafficel.ru/123?utm_term=pattern+for+wheelchair+bag PDF link annotation
    • https://damilezudof.weebly.com/uploads/1/3/4/5/134599741/xaruvojoxefi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jivala/21792795960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38611f64-9cd4-4a61-afbc-f224d585fafe/factorizacion_de_polinomios_ejercicios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f31f43-9ecb-489f-a7cf-50c166e4ef79/shut_up_button_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de05e235-0c9a-4eb8-8e2d-0ac5e752a264/fuentes_del_derecho_administrativo_u.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50add5ee-68fa-4f37-a386-042e6572de2b/conservation__la_glycrine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54cbfee8-7e7e-4494-a453-79dcea374fed/26417296243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cf0feee-1ce8-4c48-8c51-dc894ebf00d8/zofusaxesotutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/100f3a3f-47db-4051-80f4-0e0a9ef22c1e/28488233542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e946336-6e2f-4097-9c18-8f4caba85d53/apocalypto_hd_full_movie_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/111b39bb-1559-4595-b475-f6040b08f7dd/78072603386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c422244-4726-478c-8db8-26393c55c3f8/94096056348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56f6f8a-ef44-44cb-98d9-b1e907fb6d57/ygopro_the_dawn_of_a_new_era.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d6f315f-f859-4d8c-a9b8-4bbfc82702c5/xonikelamimipota.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd1c.bin
cb5c01f038c8eeb877826d3c2ec5e5c11b63159baa36b078a403c9e8775d43fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1C 4984 bytes
font_01_sfnt_off0000de10.bin
ff69e019017808277bea14f0a3fffa05946208143b312b88a9c23b561cdf7506		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE10 11040 bytes
font_02_sfnt_off000103c7.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103C7 4324 bytes

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