Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0e532b1782d711…

MALICIOUS

PDF

71.3 KB Created: 2021-03-14 22:54:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e33229ba894f5c53f5eea577b47e6124 SHA-1: 5c92193933b6bfb1be8079f097f9ec8959c3aad6 SHA-256: be0e532b1782d711853c4f9018affbd1eddacd09bd0026c4037fed3399ca145f
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 are SEO-farmed, suggesting a phishing or malicious redirection attempt. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains keywords related to search terms, reinforcing the lure aspect. No scripts were extracted, but the presence of external links points towards a phishing or malicious content delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/wix?keyword=overwatch+cookbook+pdf+free
    • https://cdn.sqhk.co/jukunobegabe/ciij8ig/4876575584.pdf
    • http://vkysnaya-eda.site/instagram_followers_booster_applicationz3g7o.pdf
    • https://cdn.sqhk.co/nupepewomaxu/iZifiha/19101824246.pdf
    • http://linza.media/the_wave_todd_strasser_full_audiobookh0ajn.pdf
    • http://remastacer.com/mokedomupusevat145vc.pdf
    • http://216tilford.com/how_to_make_an_interactive_dashboard_in_excell961t.pdf
    • http://mon-cmbretagne.com/91292679692v6i8x.pdf
    • https://cdn.sqhk.co/rirakibugo/aicGaaH/xukunisebuzejezap.pdf
    • http://help-verification.com/140266074862amo0.pdf
    • https://cdn.sqhk.co/jivumigen/d0Xighi/66638194904.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/votawawo/arduino_uno_wifi_atmega328_with_integrated_esp8266_wifi_module.pdf
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_ffa861ced8a6461d826e72a284435ba7.pdf?index=true
    • https://945c5b1a-9feb-4a08-b72d-c905ca1b1520.filesusr.com/ugd/27135d_d21afe4d38ca4e869185d8108ddd4614.pdf?index=true
    • https://6e345194-e688-4037-aa24-2ff230a16836.filesusr.com/ugd/ce9fe1_5c01afef9a2e42afb71dd90d5dd7a44c.pdf?index=true
    • https://s3.amazonaws.com/jefobexapulow/cyborgs_heroes_never_die.pdf
    • https://s3.amazonaws.com/fewunadupop/melepelomegumupota.pdf
    • https://4eff3ec4-d147-45d1-be73-876d9e1d0019.filesusr.com/ugd/efb3f0_5f233ff5f7414efe99c3b72b68cecb03.pdf?index=true
    • https://s3.amazonaws.com/vanatul/kakolipejavibufametuviw.pdf
    • https://s3.amazonaws.com/gonasidupij/stalker_instagram_pro_apk.pdf
    • https://s3.amazonaws.com/niwotipugonuvoz/banjo_tooie_glitter_gulch_mine_guide.pdf
    • https://s3.amazonaws.com/tasufagijaremo/30928424907.pdf
    • https://s3.amazonaws.com/wifukedot/wexuxoxiterizazekuko.pdf
    • https://s3.amazonaws.com/rupatojuko/basic_element_present_in_all_living_things.pdf
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_39320009cb7641a7ac91b182127995d2.pdf?index=true
    • 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_off0000d6ba.bin
4161a0183aa5cf5127e18cf214c059b07655f7f28ea870155eae4da6939d5781		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BA 5416 bytes
font_01_sfnt_off0000e92e.bin
c00c4b67a8776f7a422f1ed027f106d028414d6ea3faf9ec9a282c2e8cb6fa48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE92E 11584 bytes

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