Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b3485b7209e5f2…

MALICIOUS

PDF

84.0 KB Created: 2021-01-05 20:56:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3013e96444326593b97085a28067b323 SHA-1: cbcd253703ca9896c3f82ae2502d8f317fb9bdb7 SHA-256: 69b3485b7209e5f21d624f29078337ce2ce5d1b3e774c5516815dfe55d5ba338
214 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to downloading music, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external PDF links, likely for SEO manipulation or to host further malicious content. The ClamAV detection and ML classifier further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://traffking.ru/aws?utm_term=descargar+musica+gratis+para+android+sin+virus In PDF document text
    • https://zijedizadof.weebly.com/uploads/1/3/4/6/134692085/gowiluf-vanaxoduladika-wefefujol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424953/normal_5fe0a2497b601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5f8939f946deb.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/nunakixuma/35247233604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5adc4a59-e9be-4eb4-8d8b-39d449ef5311/the_dark_tower_book_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20784144-78a2-4750-a2a2-81b14b416c60/komaduselikotawesek.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/bare_infinitive_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/vupujulanugozujuponakaxoj.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/maroa_forsyth_school.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/elna_super_sewing_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/36038360165.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3B 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0000df20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF20 5420 bytes
SHA-256: 49786541b3481df5fb1617bd1c7e00d2e9bc962f140caff6bab147bdefa89645
font_02_sfnt_off0000f180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF180 4040 bytes
SHA-256: 73fb711f9fc0dd348ce1c42d1f1a360ec90d716c1b3c7b1a9fd29ef7a22bb39a
font_03_sfnt_off000100fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FC 11852 bytes
SHA-256: badb8bc06f1d84e5caedf34ff9ee0ded2092eeef84e58190869df56db1113c1d
font_04_sfnt_off0001279e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279E 16980 bytes
SHA-256: 24fafa0b3f8bfe7200cc5328bd34f1f5f3c6e3a5385d976e4d442223dbd92d3a

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