Malicious PDF — malware analysis report

Static analysis result for SHA-256 8470bbab0b340d96…

MALICIOUS

PDF

45.9 KB Created: 2020-10-29 09:21:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d65d9b184e546c9a0b3edc8dd873ac49 SHA-1: b4de32ebb199d9b7db6d00bc28d75af9ccf33115 SHA-256: 8470bbab0b340d96178b1c9bfeda523d8f55119f1bcb2c5bc2bff0a7135d22b4
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The document body and embedded links suggest a lure to external content, likely for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the PDF structure itself points to a link farm designed to direct users to potentially harmful sites.

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/aws?keyword=pennyrile+state+park+lodge In PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/1f2f042291555f9.pdfIn PDF document text
    • https://wegotutitupal.weebly.com/uploads/1/3/1/4/131453182/2836001.pdfIn PDF document text
    • https://ladofozaser.weebly.com/uploads/1/3/4/3/134334290/5091136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5f94b1336c679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5f8c75a3479b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_5f8e581ca4862.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuxime/preposition_meaning_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/kovor.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/aesculap_surgical_instruments_catalog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3866/8965/files/51062390026.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/munadawed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1631/3758/files/occupiers_liability_act.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/5534290173.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/rationale_of_endodontic_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/3_veces_tu_descargar_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7205/6215/files/corpse_bride_victor_funko_pop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4703/3258/files/mcts_self-paced_training_kit_exam_70-511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7306/9990/files/mibivininijomopib.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/funiluwabamug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1016/5416/files/4_25_lbs_to_kg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7201/1931/files/70758316048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1146/3076/files/word_with_ee.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/kiparuwowe.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/difference_between_geometric_cdf_and.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_off00007410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7410 5292 bytes
SHA-256: 489df5289b747a420dd0b9623e1a19e6abb1da3bd14cc465daaefdb3e6f00a5a
font_01_sfnt_off0000862d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862D 10528 bytes
SHA-256: 3e6dcff927937e0da5a4a542b8b3df96c9b596a8c6add44975ddbf40ea9cc7b3

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