Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c6df73bdbfb3fc…

MALICIOUS

PDF

85.1 KB Created: 2021-03-19 09:28:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3da1f7b19d26c707ad440884d70c32b SHA-1: 4470b818e95a8ee740e381aac78a17c992d28f63 SHA-256: 42c6df73bdbfb3fcd0bb9d6250e366ea52226dd76200a76e5146407b8430c936
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to reference a game mod, suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://resalured.ru/wix?keyword=love+nikki+mod+apk+5.0.0
    • https://cdn.sqhk.co/ponesigis/Dgcighc/jumolusen.pdf
    • https://cdn.sqhk.co/raratajuxu/ipAUbke/ketanofep.pdf
    • http://memaberenux.scienceontheweb.net/ibps_clerk_recruitment_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4418764/normal_6048c26ea9499.pdf
    • https://cdn.sqhk.co/zuzememub/c1lBajd/new_puzzle_game_for_toddlers_online.pdf
    • https://cdn.sqhk.co/fogibadeku/ejdXxid/77423837218.pdf
    • https://static.s123-cdn-static.com/uploads/4404292/normal_5fe59e84012ac.pdf
    • http://powowivoboregow.iblogger.org/allen_bradley_guardmaster_spartan.pdf
    • http://bikejesoxatelo.mygamesonline.org/pronostico_del_cancer_de_prostata.pdf
    • http://zoguponuwuxoli.medianewsonline.com/lewoxamotoliraruvekokegov.pdf
    • https://cdn-cms.f-static.net/uploads/4376878/normal_60489d3f04286.pdf
    • https://cdn-cms.f-static.net/uploads/4487623/normal_5fda5b3926d62.pdf
    • https://cdn-cms.f-static.net/uploads/4449615/normal_604859dc32915.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_e8d373fda7ee4fa289a8ffb7ccde3398.pdf?index=true
    • https://21d44941-995c-48b9-956b-8145330e20d5.filesusr.com/ugd/577b75_034efdc8317b44cc820201da40fc79d8.pdf?index=true
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_3aa2b0d38787422fa36558d6ab159a6d.pdf?index=true
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_553daa8ebeed4ecebdc15690648fb0b4.pdf?index=true
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_109f274ffeff4d30906ba05146a931e5.pdf?index=true
    • http://taroveruwidiba.onlinewebshop.net/78878813170.pdf
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_be8ae9f18f5d4a5eb14ed1f1cb251a61.pdf?index=true
    • https://7fd4abad-31f8-4c52-ae8e-93d0cc7f2af2.filesusr.com/ugd/910e70_5fdc87abf80141cfaaee331d1ee5e22a.pdf?index=true
    • http://nutujetis.rf.gd/52951442885.pdf
    • http://sozidimimu.rf.gd/recurring_payment_terms_and_conditions_template.pdf
    • http://mawidinivetobi.myartsonline.com/gozonejefuxesamajisikuvu.pdf
    • https://9305c775-266c-4126-9ef9-90a5cffee957.filesusr.com/ugd/c3f88d_b47661a405764f36a8bcd133ae0b6175.pdf?index=true
    • http://pubometev.rf.gd/happy_birthday_pics.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000febe.bin
18f4960a52d64bc83d6c304eee4b25c9ca37eec54c0f4efd5701b5568bea1fd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBE 6568 bytes
font_01_sfnt_off00010f0d.bin
c4084355b20e03371f97e61451d18d169060c839ef9c5303930c13b3df81e2c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0D 5160 bytes
font_02_sfnt_off000120a1.bin
137b9ee0f191dc68106dbd81ac8ac41db1b0452ddf2a838e59e7be02e60d7eda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120A1 11228 bytes

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