Malicious PDF — malware analysis report

Static analysis result for SHA-256 0037d6d33920b9ae…

MALICIOUS

PDF

48.1 KB Created: 2020-10-27 11:12:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6dfbc43537b6907b478ea26509d00cd1 SHA-1: e3ef4eed3b30c747117372dfc2098f1cdba2e9ae SHA-256: 0037d6d33920b9ae0d830c05d4a313ad2933b278710e194298601cfd3ff4fbc0
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links pointing to various domains, many of which are hosted on disposable platforms like Weebly. This behavior is indicative of a link farm, likely used for SEO manipulation or to redirect users to malicious content. The presence of a known malicious redirector URL further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://gettraff.ru/strik?keyword=race+and+reason+pdf In PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/e0ed9f2a1.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/5718795.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/zonezagurig.pdfIn PDF document text
    • https://misikeni.weebly.com/uploads/1/3/4/3/134336029/6ebc1e8b43a27c.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/8194038.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/felixemizu.pdfIn PDF document text
    • https://relulime.weebly.com/uploads/1/3/4/3/134384492/tegalol_zirivoka_lobuv_rapefi.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/garibaxuwekos-lofegos-damaki-numuvelo.pdfIn PDF document text
    • https://jederatikepu.weebly.com/uploads/1/3/4/3/134370591/xefebe_zabivomanafuze_zorole.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/moxokisarev.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/aeabbdaf9e732e.pdfIn PDF document text
    • https://sugabora.weebly.com/uploads/1/3/4/3/134369176/7b1ead2627e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381528/normal_5f8c87eb83e23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f87055be4cf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_5f92174d6449a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f8703b0e0de4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377102/normal_5f8bd0865eec9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d5e8a4-da29-4320-96a3-7786b587148d/overtime_necessidade_de_pagar_cpf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da8a10ce-2fd0-491e-9105-0d1c0e2fb4f4/iso_15489_information_and_documentat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae432ff-293d-40a2-b277-b44fffd964a6/geroti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a28768-178f-4b4a-8c05-5513d1af7e81/jacob_boehme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30dcd604-3f8e-4ec7-9458-b842a0f1752a/vojotime.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/19389689508.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/causes_of_emotional_and_behavioral_disorders.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/78812881056.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_off00007dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD5 5124 bytes
SHA-256: 1562240231a47ed49cdeb5b015cb4d38cdc0a03fcb7b2f1f9260755aa8a6da93
font_01_sfnt_off00008f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4B 10572 bytes
SHA-256: 732cce55b6c33198a13192b673ac811f7921dcf7d7cc0c7cd43a44a94c92397b

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