Malicious PDF — malware analysis report

Static analysis result for SHA-256 f394d7dfafad649b…

MALICIOUS

PDF

87.1 KB Created: 2021-03-17 02:30:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a714a5b5d87405bccf921c40c96cc54 SHA-1: 2cdd2969891d6d293d9767f3a8c53a156bf319a5 SHA-256: f394d7dfafad649b60d503988c21b58c81ca9440580d123238dd371da2c273b5
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a payload or visiting a phishing page. No scripts were extracted, but the presence of multiple suspicious URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://soxebez.ru/award?keyword=neural+network+python+book+pdf
    • http://varistop.site/vivokuzevelii7lu8.pdf
    • https://static.s123-cdn-static.com/uploads/4421330/normal_5fe1b1845e927.pdf
    • http://gavediteriremuv.medianewsonline.com/allosteric_regulation_of_enzyme_activity.pdf
    • http://samoe-samaya.ru/setabazidilusozacxwkv.pdf
    • https://static.s123-cdn-static.com/uploads/4469374/normal_5fcc023eca74b.pdf
    • https://cdn-cms.f-static.net/uploads/4427509/normal_604218eb98662.pdf
    • http://astrology-personal.online/dd_arms_and_equipment_guide_5e6qozq.pdf
    • http://lamaded.mywebcommunity.org/16370958073.pdf
    • https://cdn-cms.f-static.net/uploads/4382790/normal_60308f944efde.pdf
    • http://lnstagram-helps-contact.com/6728655811dubwh.pdf
    • http://rafupofamurawaf.mygamesonline.org/922712983.pdf
    • http://muzhskoizhurnal.ru/do_you_pay_rent_on_a_double_in_monopoly31ff8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xotomisen/zewugedapibukus.pdf
    • https://s3.amazonaws.com/jopomodilamego/free_verbal_reasoning_test_practice_civil_service.pdf
    • http://satawakerexe.atwebpages.com/1000_places_to_visit_before_you_die_list.pdf
    • https://s3.amazonaws.com/sinadi/86803548186.pdf
    • https://s3.amazonaws.com/wulagisi/54230437367.pdf
    • 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_off0001196e.bin
3fb353f63c8444ca0dfe4f34ae0b13a419ddc2ffc2591efc0bbb9362f94565f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1196E 5316 bytes
font_01_sfnt_off00012b93.bin
2bec582fb82841d19f23f6625d42fedc0bd76c3f2ccae6c641a4f929ba69e331		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B93 10600 bytes

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