Malicious PDF — malware analysis report

Static analysis result for SHA-256 04586aea4394b184…

MALICIOUS

PDF

84.0 KB Created: 2020-12-10 06:59:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c0a6578f4dc11885bbe980318369c249 SHA-1: 94077505f2063ab59939941b6e77a9c860c3a92a SHA-256: 04586aea4394b184eed92b7f57fee7954b7acbce8d96df208608976f67968f13
104 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 part of a link farm designed to manipulate search engine results. One prominent URL, 'https://traffset.ru/wb?keyword=conan%20the%20barbarian%20full%20movie%20%20720p', suggests a lure related to movie content. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into clicking malicious links. No scripts were extracted, but the overall structure and heuristics point to a SEO-based traffic redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/wb?keyword=conan%20the%20barbarian%20full%20movie%20%20720p PDF link annotation
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/e672fbfe327f3.pdfIn PDF document text
    • https://buxiniti.weebly.com/uploads/1/3/4/3/134309366/3367762.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/9886217.pdfIn PDF document text
    • https://zidevikab.weebly.com/uploads/1/3/4/5/134576262/nibalevudix-bomezofasisagup-rufalewineb.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://s3.amazonaws.com/jumedemimo/que_es_una_linea_de_tiempo_ejemplo.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/vemapudonejewusiroziz.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/20792306883.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/sefetigafesesukenogowa.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/gaxurixi.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/bear_paw_boy_scout_camp_wisconsin.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/angry_birds_rio_2_hacked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/93673222229.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC973 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off0000da5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5A 5420 bytes
SHA-256: 1f65aaf312c352be666b52ce754da62356ad338753a990035e69675884a5ddee
font_02_sfnt_off0000ec9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9B 2252 bytes
SHA-256: f3ffe4ba3621d765656d78aaabd71fd798feab98c1821a744cf45e925a576ee8
font_03_sfnt_off0000f6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DC 11096 bytes
SHA-256: aa8a980651802248f2bd5b047b0634b28fc0fac8d4dd7c700c1f94bb07512c50
font_04_sfnt_off00011cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD2 16096 bytes
SHA-256: fadbcb98d8f1d62e9813a7609f5fb4a164c0f07ae0437f2e84255f631a10dc0d
font_05_sfnt_off00013199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13199 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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