Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd120e87ab1f6ce…

MALICIOUS

PDF

193.9 KB Created: 2021-04-07 23:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ceee961ae6aa88ece0ff7cf01eaa55fb SHA-1: 9e755a3c138f96bf8f75f77e0dff4a841ebd3c80 SHA-256: 8cd120e87ab1f6ceb1128a6d193b889d87864cd02a932f5bcf3abf7a1e777847
126 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including ML classification and ClamAV detection as a phishing trojan. It embeds external URIs, with a primary suspicious URL being 'https://jumiwimov.ru/wix?keyword=main+bergen+line+schedule+pdf'. The document body, though heavily obfuscated, suggests a lure related to a 'schedule'. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://jumiwimov.ru/wix?keyword=main+bergen+line+schedule+pdf PDF link annotation
    • http://raifaisentgo.online/if_you_like_big_little_liesl5jw4.pdfIn PDF document text
    • http://maporivibadiwaj.iblogger.org/standard_business_card_size_illustrator_template.pdfIn PDF document text
    • http://present-mag.ru/649093875650eu91.pdfIn PDF document text
    • http://fesabip.iblogger.org/cefr_b1_test.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/luramamelolem/57778026824.pdfIn PDF document text
    • https://2065f6f1-29fb-48ac-a230-4f4ab2d4b746.filesusr.com/ugd/b62953_e1a39c2656a14471b03dc8e3747b937e.pdf?index=trueIn PDF document text
    • https://2eb5e741-fe40-4e13-9a70-20af0821b154.filesusr.com/ugd/6cf56c_24e64609bd2d410a8472bc066d7a4216.pdf?index=trueIn PDF document text
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_048b00680b7f40c4a992849fb3290ed1.pdf?index=trueIn PDF document text
    • http://moganip.epizy.com/adobe_audition_bagas31.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/banemizafonas.pdfIn PDF document text
    • http://bezalilanele.rf.gd/biogenetic_theory.pdfIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_364f85fdef85449dbed91f42c882deaa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/bufufasemaniko.pdfIn PDF document text
    • http://gogibesu.rf.gd/image_grid_html_template.pdfIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_e8a290ee46f94731b797500e0def08d4.pdf?index=trueIn PDF document text
    • http://merujepapi.epizy.com/bierce_an_occurrence_at_owl_creek_bridge.pdfIn PDF document text
    • https://ddc7b23b-31e5-4b5c-aaad-d3b7cef26861.filesusr.com/ugd/e506b8_563dcb4988c847f793297300a69d27dd.pdf?index=trueIn PDF document text
    • http://walozovelomiri.rf.gd/la_biblia_en_audio_espaol_latinoamericana.pdfIn PDF document text
    • https://a01f0313-f680-4530-87a9-ce77a10bb621.filesusr.com/ugd/ac0554_a89bb11519214c50924a23a037fd8375.pdf?index=trueIn PDF document text
    • http://betesemimototi.rf.gd/zibobuvijad.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/etica_para_amador_fernando_savater_resumen.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_off0000f323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF323 156536 bytes
SHA-256: 062b6322cf4c6de30f7227f6445e6cc429f742c6b8f2ef4dc3730b34676a1e50
font_01_sfnt_off0002c042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C042 5560 bytes
SHA-256: 39e571f16e4340dad47df976a73b79c4857fc1192880a9c7085fdd45f691832d
font_02_sfnt_off0002d328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D328 11744 bytes
SHA-256: 6a034205a628e76e76c9af640850a7db4e49709d9c40935652c0bda1a2a993ce

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