Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1f1548b68b4144…

MALICIOUS

PDF

98.3 KB Created: 2021-03-16 15:49:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 512854737f3348e7cbd70de3ae2dfc37 SHA-1: 96f1fdee18ca666d947272939f4014d4cdcf8ec6 SHA-256: 0a1f1548b68b4144a899e22341dae5ffbe74b4bc353b04fb3872eb720ed48890
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The PDF structure itself appears to be intentionally malformed, with duplicate object bodies, suggesting an attempt to evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://lozipotod.ru/123?utm_term=moment+of+inertia+rectangular+sheet
    • http://e-devletturkiyeaidatsistemimgovtr.com/homelite_weed_eater_fuel_line_sizeh9ana.pdf
    • http://alsamcctv.com/dexalisokp60n.pdf
    • https://cdn-cms.f-static.net/uploads/4464078/normal_60141a7915250.pdf
    • http://logoped-samara.ru/51222519253rgwol.pdf
    • http://pss77.ru/88877383213u1y1k.pdf
    • https://cdn-cms.f-static.net/uploads/4387924/normal_6024f312cdcc2.pdf
    • https://cdn-cms.f-static.net/uploads/4446264/normal_601607efc43b4.pdf
    • http://anarchymedya.com/twas_the_night_before_christmas_poem_short_version_printablemutxb.pdf
    • http://saveyoutubebot.com/80028131704gsnag.pdf
    • http://negeduji.66ghz.com/wulosodomojejunosuwuvefen.pdf
    • http://hookup671.site/advanced_engineering_mathematics_10th_editioni6rey.pdf
    • http://kzrovk.xyz/doveretepokefeziwomej02yx.pdf
    • http://kabonuwumew.66ghz.com/78208328011.pdf
    • http://onenature.space/setigewebabelubep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fetudat.epizy.com/sigupadutoto.pdf
    • https://s3.amazonaws.com/xupimaral/nuzukudogimibifadilime.pdf
    • http://fokogijisigife.epizy.com/seguzuboviroferix.pdf
    • https://s3.amazonaws.com/debiwelof/10858104367.pdf
    • https://s3.amazonaws.com/bajapovogam/26744565763.pdf
    • http://kunitugi.rf.gd/30789349906.pdf
    • http://xelidamos.epizy.com/93610272711.pdf
    • https://s3.amazonaws.com/zijivevip/dell_latitude_e6430_battery_light_flashing.pdf
    • http://vorawaforase.epizy.com/95371987327.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a30.bin
7678b362f22a0024d34cacf6f81fca212bd54aff4c69214d60df231587fa93d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A30 5184 bytes
font_01_sfnt_off00012ba0.bin
889c08f055c8843b4ddf8e1b48949f118e35a158de5be1ab42cb684016026bfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA0 12592 bytes
font_02_sfnt_off000156d7.bin
77905ff9885e60cfff17cf33ad9da418757c231635603c6b4cc239c84c233917		 pdf-font-stream PDF embedded font (sfnt) at offset 0x156D7 16064 bytes
font_03_sfnt_off00016b7b.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B7B 4324 bytes

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