Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be0ffda54f50dfd…

MALICIOUS

PDF

74.0 KB Created: 2021-03-16 08:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 53cbe8b25cf0f37c816ba118b7f0680e SHA-1: e14d140f175a76cfb38cdf42ad9c45e4750a8b4e SHA-256: 2be0ffda54f50dfd4eda30c5e2426669776c8439592fcef8dfebf6c3a2029f74
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 0.9996

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://nipisod.ru/award?keyword=pdf+agama+kelas+12 PDF link annotation
    • http://bhd-management.space/43800812576yc1wo.pdfIn PDF document text
    • https://tiwibuvemugijaj.weebly.com/uploads/1/3/0/7/130776889/6531175.pdfIn PDF document text
    • https://wigazasadus.weebly.com/uploads/1/3/5/9/135974004/83054.pdfIn PDF document text
    • http://tryporte.xyz/demapipemoj8e54.pdfIn PDF document text
    • https://renugukid.weebly.com/uploads/1/3/0/9/130969315/2262570.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/lowonabitum-tufudigat-gotojululosed-lewidam.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/LZjigc3/data_management_skills_resume.pdfIn PDF document text
    • http://housefashion.ru/how_to_make_a_video_with_talking_animals8qho4.pdfIn PDF document text
    • https://cdn.sqhk.co/zakolemafemo/jjshchb/92534287944.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/dqJvpQi/crash_kart_racing_ps4.pdfIn PDF document text
    • https://zuxijonimobazi.weebly.com/uploads/1/3/5/3/135351106/vumiranozadel-lubovesu-zimaji-lakegimax.pdfIn PDF document text
    • http://my-favshopd.online/mexivoxmbs.pdfIn PDF document text
    • http://gamedv.design/armando_hasudungan_freeb4lc2.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/fatisake/comparing_constant_of_proportionality_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/59749904083.pdfIn PDF document text
    • https://f6ea5e03-7e7c-4dce-82ee-fd5d223759ef.filesusr.com/ugd/d203ad_ba971cbf2cc1485089a294ba9f930519.pdf?index=trueIn PDF document text
    • https://f3874c2d-c116-49c2-b7b6-9300dc8fc43e.filesusr.com/ugd/b11f6d_d9d2a90eab8c4434ada1ddf045b0995d.pdf?index=trueIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_a3e08293ee5f43edb29b1c837d5826e2.pdf?index=trueIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_c971604303394902814a26859dac6a49.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/11975509350.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/que_es_uniformemente_acelerado.pdfIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_455f9048b15d49d7a3716e37770b0719.pdf?index=trueIn 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_off0000e43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43E 5380 bytes
SHA-256: b4d4ca0377d1c62ec4e7c01829ac7d78c88e800afc4e68ae1326a93209e0e9cd
font_01_sfnt_off0000f690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF690 10580 bytes
SHA-256: 65f973bec7c99967ee7d266d6bffc7740d78a83ce3d404b58cc8f4150aa8f7c0