Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8aaef4162d5275…

MALICIOUS

PDF

75.1 KB Created: 2021-05-29 19:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e640e37f3d5fc588ecc79558ff023467 SHA-1: 9b32a3bcbbeda88831ae739f109243587f708f37 SHA-256: fe8aaef4162d5275e3b4e5218d79fbcfade4517f86f841512ea73ea04f4c3a32
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/123?utm_term=interpretation+of+data+worksheets PDF link annotation
    • https://lulolopan.weebly.com/uploads/1/3/5/3/135323706/fb1c7a.pdfIn PDF document text
    • https://fatomokoke.weebly.com/uploads/1/3/4/0/134098041/0ccee39fd29ee.pdfIn PDF document text
    • https://pudijeda.weebly.com/uploads/1/3/4/5/134586696/kagojodezoziruf_zabuwig_zutepedif.pdfIn PDF document text
    • https://lupibifexedesez.weebly.com/uploads/1/3/5/3/135319255/tevogerufivebamurot.pdfIn PDF document text
    • https://bavazaje.weebly.com/uploads/1/3/4/3/134335981/ziwubitutixe_naxeni_bogibozevuxo_mafusunupilu.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/db438f88-eee7-4202-a4b8-fcb1b53ad2c8/77036348534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bddecbf-1a8a-40c8-8396-4d8a1b9559f1/kakijonajefaxopevatek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/960e9993-976a-4cc2-b1c4-8453e72b19f4/forgotten_realms_gods_5e_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69035d08-77a7-4fa9-9755-2a623b98ce31/78716124507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f903d43-6008-4a3e-9da4-c70998a93c53/saguxulirokubuvipovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7fcf1be-e21d-43ad-a938-ad013692261d/myers_briggs_career_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ba6aaa-bafe-4b53-a59e-3af8b1a341c3/wepoxeligoladajarifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f585f0-6730-48f2-9b28-d432fef3534a/toyota_camry_ascent_sport_2020_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/636b07bd-975d-49f6-b526-341911a8b120/house_of_leaves_ashland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc4665db-378b-425c-8f31-529539b71c60/canon_p170_dh_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a24fc86-a2fc-4f74-b124-c6d9727ebf0f/7722718801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d01299f-5358-40a0-821a-4c940095eefc/95184218660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7895d8a-8bd8-43ab-a285-79edf0e0f3f6/beowulf_translated_by_burton_raffel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1964eb06-6175-454f-9d98-2c2c3bc6a410/8776331430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4ca6a2-6c93-4697-8c82-59b1e5582bc7/how_to_use_pellon_fusible_interfacing.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_off0000e7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DF 5188 bytes
SHA-256: 0de9957798145ec5ccd5661c63a36435b29ce8c2cfcce9726a430ce62fa99ac2
font_01_sfnt_off0000f997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF997 10896 bytes
SHA-256: 58f9c36d4946f42b9334538a59f883e695ad36d8689c6b5b3c8cf713a1c2fb46

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