Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9be27d29a933cbc…

MALICIOUS

PDF

77.5 KB Created: 2021-03-08 19:35:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e8eb480fee45d1b25bf1b85c5250d5d0 SHA-1: 269c6a444b1cda553d146269ffd460ff7646420d SHA-256: d9be27d29a933cbc620d6dedf93b5a58a255b7a835bd60f23bab15ab5fac0272
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. Some of these links, such as 'https://jottigo.ru/strik?utm_term=what+spark+plug+briggs+and+stratton', are likely used to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=what+spark+plug+briggs+and+stratton PDF link annotation
    • http://ranking-se.com/pyaar_tune_kya_kiya_mp3z3l48.pdfIn PDF document text
    • http://3-bureaureport.info/xibipafezowojtvbsc.pdfIn PDF document text
    • http://zelopaqq.xyz/how_much_is_a_2020_maserati_suvc7hk4.pdfIn PDF document text
    • https://xirejefeju.weebly.com/uploads/1/3/4/7/134723985/pejotidevutoj-fuvutabena-fijusidurotosu.pdfIn PDF document text
    • https://vunolevakedo.weebly.com/uploads/1/3/4/3/134317922/jonazorokaziwadudep.pdfIn PDF document text
    • https://tuxativavowaz.weebly.com/uploads/1/3/1/4/131437956/545bb9c4fa.pdfIn PDF document text
    • https://vonupefofuba.weebly.com/uploads/1/3/4/6/134645630/9554005.pdfIn PDF document text
    • https://gokuxevi.weebly.com/uploads/1/3/4/0/134017514/3229ded8ef7c.pdfIn PDF document text
    • http://polikarmonolit.ru/dark_souls_2_scholar_of_the_first_sin_reviewskiec.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/aplikasi_bobol_wifi_id_apkcpxi1.pdfIn PDF document text
    • https://losuwigawoje.weebly.com/uploads/1/3/5/3/135304717/2083708.pdfIn PDF document text
    • https://bapixive.weebly.com/uploads/1/3/4/3/134393773/4ca199449c6d0e1.pdfIn PDF document text
    • https://xezixopizanew.weebly.com/uploads/1/3/5/3/135314636/dobab_vogazizajezu_sagewib_majebu.pdfIn PDF document text
    • https://nulebuset.weebly.com/uploads/1/3/1/4/131411431/9802693.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
    • https://uploads.strikinglycdn.com/files/fdbe7d7e-040e-418a-a9fe-cbdfd5e82492/how_to_crochet_a_large_circle_into_a_square.pdfIn PDF document text
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_1001081c25934db8a083f9cba8f55715.pdf?index=trueIn PDF document text
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_c08bb7765adc4209b0c416c78de7ca9a.pdf?index=trueIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_d1b737a8b9414089a8f2965e6873987c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1909611-23fb-4b74-82a8-0843f6739a56/what_is_globalisation_explain_impact_of_globalisation_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c556b2f-85c7-4f81-885c-5a3f56ba77e3/bawokaxewidowe.pdfIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_f861ccefe8ba4c808de851341b1b168d.pdf?index=trueIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_624c821a109048f5bea2c0c6c43f4db8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e8e891-30f1-4828-b83c-da4c0973b98d/16489364886.pdfIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_51ad9efb045e40898ec0bf50745f1bab.pdf?index=trueIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_cb1890fb21834f3cb7b661fd00901132.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/92e8e9e5-7de9-4bbb-93b6-434d478b37e1/kufuxipivevero.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_off0000e572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE572 5204 bytes
SHA-256: cfaa38ed73c86e9c5dd01bbb1ff1ff995e468d5dcdae85d1b93bf0b07cda1457
font_01_sfnt_off0000f70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70F 10236 bytes
SHA-256: 8d01dec0eee9a015dfab19ec7d57c3408b44efe9ee52f0c573a7ce0977bf81b8
font_02_sfnt_off00011a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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