Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbed057876cc8b11…

MALICIOUS

PDF

84.8 KB Created: 2021-05-11 22:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d99bfa9450d33927ca981b8da9f193f2 SHA-1: 03a62b1386dd895b86883191552aeb009c3d6079 SHA-256: fbed057876cc8b1161b9f80922e5832894e31c29f5919b7d37ed84302c439e94
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files hosted on file-sharing services, suggesting a link farm or SEO poisoning attempt. The primary malicious URL identified is 'https://maypoin.ru/strik?utm_term=can+you+play+settlers+of+catan+with+2+players', which is likely used for phishing or to serve a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://maypoin.ru/strik?utm_term=can+you+play+settlers+of+catan+with+2+players PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://19eae752-0dc2-40b2-988a-3ead9c543f91.filesusr.com/ugd/dee0a8_3e7e07547ab74e5696bd30bd087c6d0b.pdf?index=trueIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_15225ade943d4f87a395c33f01f57466.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/sultan_movie_hd_movies_counter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e065f481-06db-4cc2-a8c1-a73abc502d07/gasanufemorajigib.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/befusuvawumeg.pdfIn PDF document text
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_0dce8183504247e09744b39d2febc1e7.pdf?index=trueIn PDF document text
    • https://8459f3b7-b2e6-4b58-af31-5f29adf293b7.filesusr.com/ugd/a68450_227448cb8c264612a47fed35e5f55634.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b28b2bb4-0c38-48e7-9604-8ebc8098c71c/old_bridge_high_school_cheerleading.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/ti_nspire_cas_cx_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/why_wont_my_hp_deskjet_2600_connect_to_wifi.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/lovakureninejujipivoge.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/daxujafujobitezeri.pdfIn PDF document text
    • https://7e70056c-c2aa-4e53-98c5-50750123c107.filesusr.com/ugd/f8ae5d_fb83465e2b014c95b15f947ad2f74057.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lofese/xabizobawujoroxu.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/aavesham_rajasekhar_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/close_up_pics_2_answers_pack_5.pdfIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_c553ea4864fa4480a822f4165ef75568.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baxunaf/nategusoguzojos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ea6c61a-434c-4583-bbf1-9fb91a0e7a22/zuzunufajutusamifulul.pdfIn PDF document text
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_c2b38debb4804cfc92136b65da748e76.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tiduro/4555547357.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB56 5336 bytes
SHA-256: 3466f16125abc47a05feec8c7d4b56d38f53a40d43bbd132bc5915da0e13a84d
font_01_sfnt_off00010d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D96 11644 bytes
SHA-256: fffa861c2fec021d45789e424d89a071ad47e030fd4d3d529907b545c89a6f24
font_02_sfnt_off00013583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13583 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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