Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb78ed058e701b87…

MALICIOUS

PDF

83.6 KB Created: 2021-03-26 11:44:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d1f9e830e063992b052afbad8bd4ad6 SHA-1: 74f4dc74b449d4f5cd1b7fe72cbc9e9d75d2086a SHA-256: fb78ed058e701b8771b900ad4346b90d181784c384425121b5d1aa9b6c094898
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a phishing page or download further malicious content. The document body, though heavily obfuscated, suggests a lure related to a product manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/wix?keyword=arb+50qt+fridge+manual
    • https://static.s123-cdn-static.com/uploads/4365634/normal_5fc94f562adde.pdf
    • https://static.s123-cdn-static.com/uploads/4382418/normal_5fc98a722edf6.pdf
    • http://dimebajurebed.22web.org/89205114848.pdf
    • http://good-production18.site/sunbeam_oskar_food_processor_14181_manualxpjc3.pdf
    • http://bioforcecolumbia.site/68290785818zzl9h.pdf
    • https://cdn-cms.f-static.net/uploads/4464314/normal_60334b920f613.pdf
    • https://cdn-cms.f-static.net/uploads/4449776/normal_5fe61b02af58a.pdf
    • https://cdn-cms.f-static.net/uploads/4420930/normal_6052ede5b9bc8.pdf
    • https://cdn-cms.f-static.net/uploads/4391634/normal_600c8ddebca5e.pdf
    • https://cdn-cms.f-static.net/uploads/4408588/normal_6026b8f92f7ee.pdf
    • http://mabisujolaman.iblogger.org/best_reader_for_android_smartphone.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://varebifadilo.epizy.com/97462594576.pdf
    • http://pidezesu.rf.gd/zadefadaxudenuzarabusodid.pdf
    • http://webemorukosor.epizy.com/sbi_online_net_banking_form.pdf
    • http://punumakiwibase.rf.gd/15580982122.pdf
    • http://wirowobizofox.epizy.com/how_to_use_a_barnett_jackal_crossbow.pdf
    • http://lakiver.epizy.com/training_certificate_templates_word.pdf
    • http://wesovipimamino.epizy.com/95196423411.pdf
    • http://pagiburisodu.epizy.com/at_t_android_phones_at_walmart.pdf
    • http://mudotepejix.epizy.com/stoichiometry_practice_problems_with_answers.pdf
    • http://pusagulubuke.rf.gd/arma_3_apex_missions.pdf
    • http://jesuxesuner.rf.gd/3963270234.pdf
    • http://jugebifa.epizy.com/surat_brts_route.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_off000102c6.bin
6880b1fde024a5a8aedb25c1c549d9ec2d2fbcde73dfb11ffec5bb3d702d62eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x102C6 5568 bytes
font_01_sfnt_off0001159e.bin
fc669340b0e17f9787d689b573e6e8214d8969ba42743b595b1c5fc8427f2493
pdf-font-stream PDF embedded font (sfnt) at offset 0x1159E 13684 bytes