Malicious PDF — malware analysis report

Static analysis result for SHA-256 879880edd2e18637…

MALICIOUS

PDF

86.0 KB Created: 2021-02-20 05:39:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: fac7314ef73e0605fff17579fa2b6ff7 SHA-1: 5b7ccf7aa0bb265d24d5700fcada035a068ed85b SHA-256: 879880edd2e1863716fa46ca02660a8e408fde2d2ea9c75475d02aac4695fd93
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are SEO-optimized to appear as legitimate document downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further malware.

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://bologen.ru/wix?keyword=a+guide+to+writing+as+an+engineer+4th+edition+pdf+free PDF link annotation
    • https://cdn.sqhk.co/wajidafix/SMghii5/toxekesex.pdfIn PDF document text
    • https://cdn.sqhk.co/perolurowona/RBjcjid/metal_wall_art_sculptures_for_sale.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/23984707954vxppk.pdfIn PDF document text
    • https://purabadixubemik.weebly.com/uploads/1/3/5/3/135399060/9865384.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/4ghN7gc/31966433975.pdfIn PDF document text
    • http://youla-24.cc/fukogenijepejiteja7a78.pdfIn PDF document text
    • http://povar2020.site/modifujuxerojebupetfbvd.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/kegubinefuda/7803464388.pdfIn PDF document text
    • http://nitufuluxa.epizy.com/limited_partnership_agreement_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/gifevajonu.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/shinchan_cartoon_episode.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/new_bollywood_full_movies_2000.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/thousand_songs_of_milarepa.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/what_do_the_symbols_mean_on_my_crock_pot.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_off00011310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11310 5440 bytes
SHA-256: 6ef4116b74bc8b6805aba9105cb44c67d020ffd4f2d023dcd614880ebb109014
font_01_sfnt_off000125a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A6 10752 bytes
SHA-256: c7a0cb0af73838e3ebe04b19251818b9db017a1d72f51286de47ad6203ff2986

Open this report in the interactive analyzer, or submit your own file for analysis.