Malicious PDF — malware analysis report

Static analysis result for SHA-256 d069df914c5ac7a1…

MALICIOUS

PDF

46.8 KB Created: 2020-10-19 08:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e956a5942f7e546ea8e75a5883b24271 SHA-1: 738048fcfa9c2d0a855cfe3ceba23093ac49216c SHA-256: d069df914c5ac7a13a95fe0dc7d0ab642cb78995c3cc1115745a5a18d1ae7fc1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated and contains a URL that matches the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?keyword=violencia+de+genero+segun+la+onu+pdf In PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/d48df64aff82ac.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/zoxubu.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/diwinilimuf-foxig-dutaxegu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_5f8bc73a29bb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379618/normal_5f8a8d3b2d9a5.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://uploads.strikinglycdn.com/files/19f7ff4d-97dc-48c4-8038-9c34a3f8de95/faxalatipidusitedubizawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbac6c38-c088-4309-8e5a-03e15d1706fe/muligak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cecc3284-abdf-49be-9f83-0b66649bdb56/5958489294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c482027-c622-4b86-8df8-932947631eac/84127847077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0281996a-617a-4e44-bc23-e8f958f398d2/download_gratis_bedrijfsformulieren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/732a9fc3-70fc-49d7-aaff-64d56050a1c5/kawemegagukifebano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45d595d-a0ac-4b2a-996a-7aacd1845581/71257405626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1689b71-c17c-438e-8ccb-5372a2ce1171/fabumugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c285b36d-7e1a-4a17-910e-04f7330011fb/nepiliromo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e935d160-15ef-4441-90d6-2bedb9466192/19287790059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaf341f4-b9e2-40cd-b235-12597248ebfe/zejetegebiwosurebir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14281003-d4a9-4026-85a9-e34dac42f2d3/25850783183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2734393e-2f06-4e88-8733-75f4c74d5fec/taco_bell_mild_sauce_calories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/992c3aae-092e-452f-90f5-be23fc4fe3f3/36505658256.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_off0000690d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x690D 5088 bytes
SHA-256: 3d6180ad7411257ec04474f77da6fdfc798501c2470e520af1122713d419b772
font_01_sfnt_off00007a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A64 10944 bytes
SHA-256: a028e43eaf7b34440d6f50f8368795bc4cc85e23a2dae4fdbb20f0ead6e8a72e
font_02_sfnt_off00009e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E13 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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