Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba006aa6628ce3e…

MALICIOUS

PDF

77.2 KB Created: 2021-03-25 12:29:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e2721c857ceacdd5c8bdb18efc11b518 SHA-1: 961a609432a9ec397b44efa5fd8644d7a5bfa6d1 SHA-256: 8ba006aa6628ce3e56a1d27c730515a73a6a537a5d9002e3f6f7666244cd80f2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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.
  • 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://kuzutuzo.ru/123?utm_term=40th+birthday+invitation+templates+blank PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469359/normal_600d0f4e11a4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408989/normal_6058a5ff01915.pdfIn PDF document text
    • https://lefamadagizid.weebly.com/uploads/1/3/4/7/134704745/2931914.pdfIn PDF document text
    • https://degijidugaf.weebly.com/uploads/1/3/4/8/134886203/c9dd39f.pdfIn PDF document text
    • https://resuzomesidi.weebly.com/uploads/1/3/4/7/134746605/ae21de552913a31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450350/normal_5ff16a271347b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420039/normal_5fe76ae415f2e.pdfIn PDF document text
    • https://goweruvewej.weebly.com/uploads/1/3/6/0/136015665/8522425.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/sewifenapim-xuligi-konavax.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/39a36724-043f-4fbb-a2ba-8a4d7edf5004/jubulutuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54769e2b-6bce-4417-8aeb-6c628ac43c63/14954729770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb789b7d-a921-4a1f-b9a9-655e06d2d099/jbl_flip_5_walmart_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a515c5a-1bcd-4662-acbd-81ae36f504ee/todd_lammle_ccna_200-301_free.pdfIn PDF document text
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_7937aa65d1344c5d8f3fb42930199d89.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d0dd61-c4a7-4f7f-8eb3-256dc897f1ae/does_bloodline_end_well.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ffe7860-dabb-4231-a5ed-314865399155/32671241774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25cb7a96-56f5-4b4c-898f-7f42d7c1fd33/how_do_i_change_the_code_on_my_kwikset_powerbolt_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f0ca335-8ac2-4ffb-b994-b16c56ae10ee/juvipagil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb85cfec-5fd3-40b1-b56b-3738e4d8fb81/child_of_the_dark_sparknotes.pdfIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_5d5c6608d5cb4ff7a776472e314873cb.pdf?index=trueIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_886e84ab85b841a6a5436af3e65e0f4a.pdf?index=trueIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_35257a21de7144e2ad2da8d5feeecab3.pdf?index=trueIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_ae0fa1fe2b36416fa5c1b65b852bdd62.pdf?index=trueIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_0b8395e7d6ed4c438bab0751de8bf795.pdf?index=trueIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_4e9f84ce2bf04352bd11d90ad323a98f.pdf?index=trueIn PDF document text
    • https://2fe0a9f4-4d23-48c4-8711-d5fb25093877.filesusr.com/ugd/683a75_2ffd2a9e6a1348f082a2e06dfb8203fd.pdf?index=trueIn 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_off0000efd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD3 5700 bytes
SHA-256: ba8bc899ac7cdf0e3736ee2923fcf004f62d80070315619fc95b533a6301097c
font_01_sfnt_off0001030f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030F 10568 bytes
SHA-256: e5510bea68283b649e77b908aa6b67df43382543c0f87ebbe1a923e6fa04d1cd

Open this report in the interactive analyzer, or submit your own file for analysis.