Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e8c1bec5b1bb6f…

MALICIOUS

PDF

77.8 KB Created: 2021-04-06 04:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 778a29bbb35f5cfe5b8ddb8d53532d79 SHA-1: dd3bd83ed4476c8dd0df8292d1b90a354491ce6c SHA-256: 19e8c1bec5b1bb6fc1d0eeada56b320cfe65704edd3cd217be1a96d74ceafa20
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be part of a lure to direct users to these external sites, potentially for credential harvesting or malware distribution.

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://maypoin.ru/award?keyword=lesiones+del+nervio+facial+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4380867/normal_5ffaa22694737.pdfIn PDF document text
    • https://kelesive.weebly.com/uploads/1/3/0/8/130874426/8249086.pdfIn PDF document text
    • https://sosojisizavawov.weebly.com/uploads/1/3/1/4/131454692/5440744.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416502/normal_5ffe42c935c62.pdfIn PDF document text
    • http://xidakuxekon.22web.org/advanced_english_grammar_for_hsc_2019.pdfIn PDF document text
    • https://pixerogamaba.weebly.com/uploads/1/3/1/8/131871590/sixizatupumovu.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/536d9ce88a6e0.pdfIn PDF document text
    • https://lezevonunibo.weebly.com/uploads/1/3/4/5/134577944/nufutirewamejudibu.pdfIn PDF document text
    • https://garizoruzaxa.weebly.com/uploads/1/3/3/9/133986237/tatoke-xekeburimubesa.pdfIn PDF document text
    • https://dofipoxadule.weebly.com/uploads/1/3/4/3/134314370/bbc18906c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455207/normal_6033bf0905461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474985/normal_603f47db775fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_5fd7d013c7fb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://walagezumeg.epizy.com/56090176684.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/ar-15_magazine_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/13646170537.pdfIn PDF document text
    • https://e7e1611e-f78d-4dfd-b5ce-3be5f579732f.filesusr.com/ugd/4b76a6_85005f005c3e4ef898caef0ed1a1bc76.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/how_to_download_marriage_certificate_form.pdfIn PDF document text
    • https://3c8d80e7-2998-4b53-b1db-ea2053e4eee2.filesusr.com/ugd/5c8c55_e76e07e974f0452a963db2c90081adec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xisefowu/hp_officejet_j4680_all_in_one_power_cord.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/schindler_330a_controller.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FF 4860 bytes
SHA-256: 113bc9eb4e8ed7b2758263dac18ddf79ea2a4e6c256f3be73415cf4cb36c7a8f
font_01_sfnt_off0000f590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF590 11296 bytes
SHA-256: cceb7f1c0d00efd978ce82b89bf316a653a2e193885a6c358b9946bd6904930e
font_02_sfnt_off000119d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176