Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a82d87d05d23d9…

MALICIOUS

PDF

92.1 KB Created: 2021-03-06 01:17:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 96666eb4947e22f04a4303b40f5053ed SHA-1: eb2fc9235da9e58f170a8452492ba76f047f672d SHA-256: f6a82d87d05d23d998ff77f1d69c5c55350e9b8dc62eb17fa13c398f34a5ecd5
156 Risk Score

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 0.9994

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://maypoin.ru/123?utm_term=acer+chromebook+15+intel+celeron+n3060+review PDF link annotation
    • https://tiseworadew.weebly.com/uploads/1/3/5/3/135317060/3770459.pdfIn PDF document text
    • http://robertferrell.net/xezagalilupuvuxuguwojubbz64k.pdfIn PDF document text
    • http://topstudy.fun/alcohol_and_lactic_acid_fermentation2xv06.pdfIn PDF document text
    • http://tryplafond.xyz/90098801358451oo.pdfIn PDF document text
    • http://dkmz1.club/descargar_driver_behringer_xenyx_qx1202usbewpx5.pdfIn PDF document text
    • http://creditscorehelp.info/java_se_6u211ytf5x.pdfIn PDF document text
    • http://glasshookahcatering.com/wiwododulukilowiniwife613bx.pdfIn PDF document text
    • http://sodahub.pro/hola_vpn_for_laptopeiieh.pdfIn PDF document text
    • https://puxekubokoru.weebly.com/uploads/1/3/4/6/134683715/c5d1c33d9d94.pdfIn PDF document text
    • http://sallles.ru/champak_story_book_in_hindi_full_freekswcb.pdfIn PDF document text
    • https://zuwubusonelab.weebly.com/uploads/1/3/0/7/130739898/6544075.pdfIn PDF document text
    • https://wukodotimage.weebly.com/uploads/1/3/4/4/134487216/jobuludajowolo.pdfIn PDF document text
    • http://raisinslabs.club/why_did_the_house_of_usher_fall8dkfv.pdfIn PDF document text
    • https://penatiwateli.weebly.com/uploads/1/3/4/6/134617533/zujanojuwirug.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/dowadotiju/sslc_english_question_paper_with_answers_2019.pdfIn PDF document text
    • https://ec08fec6-e576-400d-8504-372613838d3c.filesusr.com/ugd/57e0ce_b98bd9e167ea44258a3eb859f93b2982.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/turarezuduwikivetexupugop.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/33602263255.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/used_ford_mustang_gt_convertible_for_sale_near_me.pdfIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_2014375653114dc3b563cb4e879a40e7.pdf?index=trueIn PDF document text
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_b1f7521999704a6784bb8c0ee83d43c4.pdf?index=trueIn PDF document text
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_b22b54dee32741009f8237c97b403466.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C2 16128 bytes
SHA-256: 2b5a8d7e32683d838e7c9bd6ed963a76a18def40d41a83dba515460459229378
font_01_sfnt_off00012738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12738 5632 bytes
SHA-256: b2e5519ef350a90d07152083b69da3c07afca2ff28b00974449a2a454ae9a9ce
font_02_sfnt_off00013a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A5D 11236 bytes
SHA-256: c4806ffa4762a5467f17dce052243922000a332c7fb37a0fffb1ed7a1e96a2c4

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