Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2b6876e507519a…

MALICIOUS

PDF

81.3 KB Created: 2021-05-23 23:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3d8c990e051f467987add54bb70caa10 SHA-1: 2515c88f11085fb15a919be652a69634046e727c SHA-256: dd2b6876e507519a2c73c01f0f9d4e369b1b80597493d5fab957820d80e54ec4
156 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 0.9998

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://midufefew.ru/strik?utm_term=what+fuel+do+you+use+in+a+coleman+lantern PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367937/normal_6069f8e0585db.pdfIn PDF document text
    • https://pareruli.weebly.com/uploads/1/3/4/8/134891857/lomopumaxizebi.pdfIn PDF document text
    • https://nusewumu.weebly.com/uploads/1/3/2/7/132740482/demukopepaxekuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419211/normal_6015b84443bf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481163/normal_6057e229414a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484812/normal_6064b0366d15c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384851/normal_60493212cf5bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444102/normal_6068864f4ce1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417325/normal_60272099acaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422144/normal_60112b4bca533.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/11c320fe-509c-49fc-a432-dbeb9207bbaa/2397536178.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/59517548424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2170be-8df7-4df9-b531-d2b47591697d/app_para_aprender_ingles_con_letras_de_canciones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0643c82-c38e-4283-858e-859781cdad2a/how_to_change_vivint_thermostat_to_heat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/027f4af9-7f1e-4262-8038-102e97282d38/how_much_do_foster_parents_get_paid_in_wv.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/ejemplos_de_limites_de_funciones_algebraicas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f73a09-685d-4a8d-a17c-d46fb0e47c62/weguwawun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50bd2fdf-c9ff-4f4f-8b60-609eeba14edd/picture_books_to_read_aloud_to_5th_graders.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/the_battle_of_labyrinth_graphic_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2251eb46-22ad-4edf-89c5-337505e77139/new_look_cameo_rose_white_top.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10030 5376 bytes
SHA-256: 382afffaf4ea1d51f56e4e4302e2d74e8f3a7c4b2d84b990bb1bdb4f197e7a1a
font_01_sfnt_off00011263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11263 11012 bytes
SHA-256: e9457fa8b39812c6d104eb4c2f5c0c27a055fb574124ecd8ba53ffa0fc373c6d

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