Malicious PDF — malware analysis report

Static analysis result for SHA-256 908eb2c7a37c2922…

MALICIOUS

PDF

85.8 KB Created: 2020-12-23 19:39:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: aff4139874e6debedfe716665ba5a8c4 SHA-1: db9baffdc5accf719b5a2c5a4946db77f081ea06 SHA-256: 908eb2c7a37c2922ed6df2547bdcf791039be66c22afc3626a0fb9ed102e2c95
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 point to potentially malicious websites, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are designed to redirect users to harmful content.

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 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://trafftec.ru/aws?utm_term=secure+folder+samsung+apk+for+marshmallow PDF link annotation
    • https://gafekiwukuwemul.weebly.com/uploads/1/3/4/3/134313713/pokejobobimipoko.pdfIn PDF document text
    • https://cdn.sqhk.co/bitubebo/jaicgha/spider_rope_hero_ninja_gangster_crime_vegas_city.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/CLuzqii/janevevopesebatafinikafed.pdfIn PDF document text
    • https://rinefoza.weebly.com/uploads/1/3/4/8/134883618/rekofilivu-nulalivudezex-sepukuzapakiniv.pdfIn PDF document text
    • https://mabufome.weebly.com/uploads/1/3/4/8/134880487/477737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367687/normal_5fbbb0bdedd20.pdfIn PDF document text
    • https://cdn.sqhk.co/mokavokaven/JigJhHL/space_heater_walmart_price.pdfIn PDF document text
    • https://cdn.sqhk.co/sononipo/hfVjjdc/lovedirifinapalaxolavesod.pdfIn PDF document text
    • https://nogonosexenepe.weebly.com/uploads/1/3/4/6/134674491/rezenejif.pdfIn PDF document text
    • https://cdn.sqhk.co/mozejipakas/hhYTFif/gupora.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/mavixu/dudodavubu.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/agenda_medium_condensed_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/begixivivotububazulapur.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/2019_calendar_india_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/beyond_compare_4_multi_platform_pro_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/accelerometer_sensor_readings_android.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC241 5584 bytes
SHA-256: ca5e16960fc04a6b07a3680feba785588f74cefaab72a0dca310f22621f276b6
font_01_sfnt_off0000d512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD512 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off0000e06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06C 10340 bytes
SHA-256: 0cb90f03046e121c5fdd9ac909140d8f3e7070a1331475baf7af0c7bc5b1a278
font_03_sfnt_off0000fd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8C 10344 bytes
SHA-256: bdb10a5865a219dc79d853028ba3d918d547a03e4ad694b61193daa93aa1dd6a
font_04_sfnt_off000120f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
font_05_sfnt_off00012ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF0 6580 bytes
SHA-256: a1cfc5107455c382569fd04544710f1f927727b5fe0c1e31c9e87e3ff45ca641

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