Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eff29e90c424eba…

MALICIOUS

PDF

82.0 KB Created: 2020-11-10 06:30:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 195c3a57159e9787c8dae37150a3453c SHA-1: 28af4756e37769b11e4b4ee376d79b6b36bfb671 SHA-256: 4eff29e90c424ebaaa1c88e5dfda2c0616345654124f46b6077a09487993ece9
186 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 0.9995

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://trafffi.ru/123?keyword=psa+pokemon+card+prices PDF link annotation
    • https://wavixupenug.weebly.com/uploads/1/3/4/3/134386336/ba4cbc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375071/normal_5f9ce3eba2c7b.pdfIn PDF document text
    • https://texolobalow.weebly.com/uploads/1/3/4/5/134597330/1990840.pdfIn PDF document text
    • https://ruzovaberup.weebly.com/uploads/1/3/4/6/134651658/97c7b.pdfIn PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/9944730.pdfIn PDF document text
    • https://danizodeker.weebly.com/uploads/1/3/4/5/134581754/jipuretunexi_fufubupu_gumome_puluxanoz.pdfIn PDF document text
    • https://todijaxazifaro.weebly.com/uploads/1/3/4/3/134342800/furizomawik-tudiwomepafe-rodefotumomar-dovuwirukanovol.pdfIn PDF document text
    • https://xufibafit.weebly.com/uploads/1/3/4/4/134403857/80d871eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f9eb528288b0.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/kuwekewugi.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/b1347380-1cfb-43b8-b44d-622b9bea81cd/pamididibezawawiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ef51970-9c30-49d2-b497-4b802a8f2160/watch_joker_2019_hd_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/career_paths_beauty_salon_express_publishing.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_off0000d0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AB 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off0000e09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09F 5252 bytes
SHA-256: 98eadee9006292c0163b786cdbbe5a5e82aadbd11c3165aae0306983e9269eea
font_02_sfnt_off0000f260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF260 2784 bytes
SHA-256: c502bcd75bcc53ed68da1bf967cf49fe4f3e91a7bdc1c7eae01bfbb7d1f9ccd8
font_03_sfnt_off0000fe31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE31 10976 bytes
SHA-256: 39bccafb01da5d8c5cdbc1b16c60c763da546f1555b9f6cd9a40c72035eaa973
font_04_sfnt_off000123ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AE 16664 bytes
SHA-256: 0038271dc09bd3db37551fb851982e08e31f798c5c14d7e270b12fe1c4258317

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