Malicious PDF — malware analysis report

Static analysis result for SHA-256 617ec8f77c37de79…

MALICIOUS

PDF

83.3 KB Created: 2021-03-27 14:33:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ee53b2500eb17404e0d56723722c4ac SHA-1: 4f1dddc04a17ae24c8617e54fdb4f3feb7fd2e48 SHA-256: 617ec8f77c37de7973217b112a8e7d8c41e78d96ac616d073f8a65696f19e8b9
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a phishing page or download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a 'worksheet'.

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://midufefew.ru/wix?keyword=colons+semicolons+and+dashes+worksheet
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5fd76d649d248.pdf
    • http://itdiscount.pro/bachna_ae_haseeno_instrumental_ringtonefns0k.pdf
    • http://bloomwithdeanna.com/loremataxupeptll9n.pdf
    • https://static.s123-cdn-static.com/uploads/4428054/normal_5fe57c4860130.pdf
    • https://cdn-cms.f-static.net/uploads/4444856/normal_601a3228a7ecc.pdf
    • http://petrol-v-pol-price.site/kerosene_heater_repairs496do.pdf
    • https://static.s123-cdn-static.com/uploads/4366402/normal_6000ea4f2e56a.pdf
    • http://ionatr.fun/lost_stars_main_characterse183m.pdf
    • https://cdn-cms.f-static.net/uploads/4393026/normal_6044dd1dc3832.pdf
    • http://paypallsecurity.com/gazopavejisupukejaiaifs.pdf
    • http://d-youtube.com/metro_2033_redux_walkthrough_dead_citycv98k.pdf
    • http://marketitaly.info/21061884350lxhog.pdf
    • https://cdn-cms.f-static.net/uploads/4374851/normal_5fd5f5b4a61cc.pdf
    • https://cdn.sqhk.co/raxuzuvuluf/jfjhjbx/joridenovob.pdf
    • https://cdn.sqhk.co/bimowikosaru/oIgjiaB/97610598975.pdf
    • https://cdn.sqhk.co/famazipow/hd3Wha9/geode_bookends_australia.pdf
    • https://cdn.sqhk.co/vagizabibo/GTQgd5o/ninda_sheebah_karungi_mp3_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://b7c0b8aa-2746-4b81-86ab-4dfcec723e12.filesusr.com/ugd/383078_31a2f34d31bb49f2a8641dddeb2873f2.pdf?index=true
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_26d3459069f045748cb603c57008955c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f920.bin
9b618c54b3f671ee975bd9782a60be5d4e90ea9cb89e63bba217ac38a6323b60
pdf-font-stream PDF embedded font (sfnt) at offset 0xF920 5148 bytes
font_01_sfnt_off00010a77.bin
5008e6f3cf9d733afbc7b8a6b8b68346571dd88e74bad785b4c959108819a2c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A77 11556 bytes
font_02_sfnt_off000131ca.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x131CA 4324 bytes