Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee99b54025b044ca…

MALICIOUS

PDF

69.8 KB Created: 2020-12-19 06:22:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 497738b4bb1338a27a6444c6b03f7c0e SHA-1: dcf2de65339c71a4687d09f824931e430071f46c SHA-256: ee99b54025b044cadffa23b50fa0324652b0aafcf4c8fadc85375c5ed7801b4e
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing lure. ClamAV and ML classifiers also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a malicious intent, likely related to phishing or redirecting users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/strik?utm_term=blackrock+find+your+future+forum
    • https://lemisisax.weebly.com/uploads/1/3/4/4/134494561/a323caea167bf5.pdf
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/2c9dad4b338fa0.pdf
    • https://fosegeluka.weebly.com/uploads/1/3/4/7/134717840/e214e176b720931.pdf
    • https://juromimabosag.weebly.com/uploads/1/3/4/6/134644914/bupisozosonovamixina.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pibabopuduj/where_to_watch_aquaman_2.pdf
    • https://uploads.strikinglycdn.com/files/a325dcc7-d5f9-4516-82f5-f27e3bc0477b/81079386272.pdf
    • https://static1.squarespace.com/static/5fc4ce86403f5353fdaeacb4/t/5fd74d595488895576c84046/1607945562692/phenolic_pipe_insulation_data_sheet.pdf
    • https://s3.amazonaws.com/xamapebonijos/adobe_indesign_filehippo.pdf
    • https://s3.amazonaws.com/bitajemisajoz/kawosonozimud.pdf
    • https://static1.squarespace.com/static/5fc589e9084698658e7dc178/t/5fc80d78624efb02ab5d3aae/1606946169191/lijisiwojap.pdf
    • https://uploads.strikinglycdn.com/files/3cb50ea8-fc1a-4ea3-be21-add0008edc9d/choti_golpo_kajer_meye_chele_baba.pdf
    • https://s3.amazonaws.com/gulapore/pilej.pdf
    • https://s3.amazonaws.com/pubopelej/vasunobikalije.pdf
    • https://s3.amazonaws.com/vavale/340_mm_equals_to_inches.pdf
    • https://s3.amazonaws.com/dewutexorob/best_guided_tours_of_ireland.pdf
    • https://s3.amazonaws.com/xakapudakadu/37192864953.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1b2.bin
d27d7a394d8b2eb6c7ff65d77f57bf7a54404645b81ce879f86a4a526369007a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B2 5204 bytes
font_01_sfnt_off0000e35f.bin
03295b8e4bc1e6ae3940ce83aab820412a2d3b3f2d684b6bd74075affb90ca19
pdf-font-stream PDF embedded font (sfnt) at offset 0xE35F 11288 bytes