Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff55175da5b4cca…

MALICIOUS

PDF

68.4 KB Created: 2021-04-05 18:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 26528d31085ea5809cf5040d1bcf4eab SHA-1: b8bfe7fffc0804faf2ef47cef5a87ecfb6f203a3 SHA-256: 2ff55175da5b4cca134a263748b028b7697dcaccd33d3f5942848140e57cdc5a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://gimoguvi.ru/wix?keyword=bissell+little+green+jr+manual PDF link annotation
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/1364477f74.pdfIn PDF document text
    • https://pupowoxixibigi.weebly.com/uploads/1/3/1/4/131438439/9096457.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/be175683-904f-41bc-9d69-1bf5063ff32f/what_is_a_word_that_starts_with_o_to_describe_someone.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/phenol_chloroform_function_in_dna_extraction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/075c20b4-0904-4cc3-a335-e0a90e445382/22336801011.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/jenetorelofagodamovewa.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/bseb_matric_result_2019_marksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/how_to_use_crock_pot_express_pressure_cooker.pdfIn PDF document text
    • https://3c3713de-992c-4571-92b4-00afcb8cb2c1.filesusr.com/ugd/9dbdb2_cf7d3ca02c9949f0bf98f088bf7dd09b.pdf?index=trueIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_deb892465a6448fb8621e72ccbe7934e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bcc50c3-0c7d-40f9-a57c-72ff0b7a0624/harbor_breeze_ceiling_fan_remote_no_learn_button.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba343dd4-4ce8-48e0-8a60-3c2606e8fbd6/teten.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_5293c589a14947ec90db29b96d590bb6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/7151827758.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/minipijezugetof.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/barbet_dog_breed_information.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/dijugoboduropazozo.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_feadabf980f548f3a4d284072c9eff9a.pdf?index=trueIn PDF document text
    • https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_0e593691f6b1452088738dd69aab9dbf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/69853d60-642e-4653-96bb-949ce7d6061c/79875348263.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/97479850508.pdfIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_a322fa56b72845f4ae8ba85800bad379.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_off0000cd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6A 5128 bytes
SHA-256: 969523eabd3974b1f31563b87092215190371518813837af13d0599534665dab
font_01_sfnt_off0000dec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC9 10556 bytes
SHA-256: 02e0f9f1b35880080c42b7f92f2c7ad1ab2046bd87f99373201a69eec2372d39

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