Malicious PDF — malware analysis report

Static analysis result for SHA-256 898e4e921a56cc05…

MALICIOUS

PDF

46.6 KB Created: 2020-10-26 12:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f2c041d29a2ddbb48aefc4be4c7da5b8 SHA-1: 4d883e2d86fe70dcfc8a67a345d3bc4172e4fdd5 SHA-256: 898e4e921a56cc05d2e6ece3505140ec46157a0f2aefb96ffe94a22563b4ed71
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to external, potentially harmful websites, likely for phishing or malware distribution.

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://gettraff.ru/aws?keyword=aliran+filsafat+pendidikan+islam+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373502/normal_5f88ba4299765.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/sutagu.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/larof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5f8e44cfaf300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_5f93ae4722f98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_5f8efd6cb8b55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379618/normal_5f9236289c7a7.pdfIn PDF document text
    • https://xazojitov.weebly.com/uploads/1/3/1/4/131408465/roporeleda_lisod.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/xuluzuwupa-xeloxetekabeni-limur-miwaxivuv.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/05d879ad7.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/5860f79e-357c-4167-98cb-77b576f6e1f9/tuwijapenadebazuvune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9afa9c04-c8d6-465f-b957-dbce96c559f0/matilda_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2289b2d-7113-4f2a-8ea4-1a3eb920fa9e/74192266225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d1373ec-b547-4455-a541-a4be1151be4a/sufiluzaropaliputijipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a7e031-73e8-4a8c-aa98-37a9d42f2e0f/66017120782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d2a1b84-715a-4cf8-8bee-31e47c5f2695/25368090876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62559837-f196-4cdb-a215-debe44f3fc8d/pokemon_tcg_redeem_codes_free_2019.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000625b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625B 5240 bytes
SHA-256: 317c7f12528c44d82dd13b05a343d456b5b7fc6795d258f26db4ae2224acf6bb
font_01_sfnt_off00007413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7413 10120 bytes
SHA-256: e49c16f96961de88fb7b3f48e301a2314de8efebaae0b32ddcf327cd2d8ef029
font_02_sfnt_off000096a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96A6 16448 bytes
SHA-256: 3f7f6beb0f5865f83039c8434023d34048916fbab515aea8bfee4d6c7e3f3101

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