Malicious PDF — malware analysis report

Static analysis result for SHA-256 64228da1bba3cb5b…

MALICIOUS

PDF

122.3 KB Created: 2020-11-27 18:10:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a06f88ab269a2a5b314c4c25d8556645 SHA-1: 279a69313b4a528c0855a0ea7c04159a2d7ac38d SHA-256: 64228da1bba3cb5b9936d2f3a165bab1fa3b8e5d0b5aadff5141bce9bd271c67
186 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 0.9783

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/strik?utm_term=power+of+2+table+pdf PDF link annotation
    • https://fineruliji.weebly.com/uploads/1/3/4/3/134313455/pimalafe.pdfIn PDF document text
    • https://dewasujule.weebly.com/uploads/1/3/4/3/134340999/81ba57ad49ac1.pdfIn PDF document text
    • https://xizotikozuza.weebly.com/uploads/1/3/4/5/134587863/9457678.pdfIn PDF document text
    • https://zabapekiji.weebly.com/uploads/1/3/4/4/134470890/4244479.pdfIn PDF document text
    • https://xozukogazi.weebly.com/uploads/1/3/4/3/134371147/4674416.pdfIn PDF document text
    • https://luvupomadimudux.weebly.com/uploads/1/3/4/3/134350134/7605226.pdfIn PDF document text
    • https://wuxavumitot.weebly.com/uploads/1/3/4/6/134683172/jiwaxizaf.pdfIn PDF document text
    • https://makonajarozov.weebly.com/uploads/1/3/4/3/134341931/7110329.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/punurum/libreoffice_open.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68ea0633-81c8-4d17-ae8e-669b8e17d541/tawesikesigorepaxide.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/gambar_bendera_merah_putih_gif.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/scarica_alice_mail_per_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdf7ac9b-8769-468d-a370-77900cd086d7/64623737905.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 12

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEC 6892 bytes
SHA-256: b9a442aff76ab2aa00c0e5aff73e35b85c010123ba7a43d45a6db2bcfa41c2a3
font_01_sfnt_off00012d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D09 3372 bytes
SHA-256: b1434a32c957d3ac180f7ce04f5b31a862d22f8b0a8faf8fcd72d3c23f6e554f
font_02_sfnt_off00013905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13905 5220 bytes
SHA-256: 448cf17ae9698b4b370cb288a19877ddea000777b343e3056c822da921e7f29c
font_03_sfnt_off00014ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AE1 2148 bytes
SHA-256: f49a188273a5b5af505ae6426e14c8e57c29733e79f00761292ad1e3f3641f23
font_04_sfnt_off00015443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15443 3836 bytes
SHA-256: 2e2af14f7b5c502c65a87c293c01e9004a3fd4d22e11f6d5c6932c1eda509dc1
font_05_sfnt_off0001602b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1602B 3988 bytes
SHA-256: 2e624b58b508e26166bcd1e0b98e2ec2c9b6b6e8c1f1cc5f40251129205e11d5
font_06_sfnt_off00016c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C2A 1500 bytes
SHA-256: 42e97019a4ef7b8ae723a6daa573ca68d83896375811fe9f81a17ce3c846f200
font_07_sfnt_off00017451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17451 1488 bytes
SHA-256: 7551378b85a22fc8aa6d46ec787582ca2cd17b2aecbf9521424513d7b4ad382c
font_08_sfnt_off00017c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C7A 5860 bytes
SHA-256: 03e9f3da46660ede3b087f4c03b5403f8b831b3925df4b1a42cc0b8d6dd856e7
font_09_sfnt_off00018b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B3C 13708 bytes
SHA-256: e0481fe1f32f94ffc74445bbc39c4cc53504dcdae55ebfcf78a76f5fcbf92c89
font_10_sfnt_off0001b83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B83D 16356 bytes
SHA-256: cd9850e390d8889a2c72749e345f0c05de2464d5297501a86576b7d1c5f5db82
font_11_sfnt_off0001ce53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE53 2348 bytes
SHA-256: 4767529b4d49c891e60373e530deb4892f72b9f3751f4fe9fb7e57ea444e090f