Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9d20451d3cc487…

MALICIOUS

PDF

73.0 KB Created: 2020-11-12 17:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0595c118dec2ff42508b0e14e904d6a2 SHA-1: 9ec5fb1727a1d41e3dc7369d8455dcd0601f0d1b SHA-256: 5e9d20451d3cc48785271ad024d98a61560d6b878a933f83f7164c22ff096214
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'Dura daddy yankee download', likely intended to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/strik?utm_term=dura+daddy+yankee+download
    • https://cdn-cms.f-static.net/uploads/4408483/normal_5f96332be7f26.pdf
    • https://cdn-cms.f-static.net/uploads/4372955/normal_5fa1f3966de01.pdf
    • https://cdn-cms.f-static.net/uploads/4373504/normal_5f968fae6e760.pdf
    • https://cdn-cms.f-static.net/uploads/4405419/normal_5fa876222dc51.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/666337dc-4cf0-4cda-8b96-3fa60bb3e973/96260229906.pdf
    • https://s3.amazonaws.com/visagogijulep/buy_here_pay_here_dealerships_rock_hill_sc.pdf
    • https://s3.amazonaws.com/panalipolifod/20791348762.pdf
    • https://uploads.strikinglycdn.com/files/8747c22a-a514-4fdf-9d26-dc3644ba9647/how_to_break_a_link_in_excel.pdf
    • https://uploads.strikinglycdn.com/files/9c52c759-966e-4a7f-91d1-dde53bd257b8/77545128597.pdf
    • https://uploads.strikinglycdn.com/files/040f22ff-33bd-4891-b1fd-20daa0b2f918/rca_rtu6549_review.pdf
    • https://uploads.strikinglycdn.com/files/ded081b2-741b-437a-995e-9d5130f6e018/ti-86_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/f6584d8f-bfc8-4235-a72a-ed516cbea13e/zaxivewavix.pdf
    • https://s3.amazonaws.com/jevopemosod/classic_wow_shadow_priest_pvp_gear_guide.pdf
    • https://s3.amazonaws.com/pukasojalu/viwudus.pdf
    • https://s3.amazonaws.com/jiwisigetizoxif/understanding_and_using_english_grammar_fifth_edition.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000f2da.bin
a8706bc4af6763133f02c359a746988cf55f7ef644c476aac7d69f1a4ab334e1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF2DA 20724 bytes
font_00_sfnt_off0000b0c2.bin
aa5372358103b7cc4ef908374b598f052ee1396b52dcf70fa50afca2ab89f292		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C2 3036 bytes
font_01_sfnt_off0000bdd4.bin
27ccd08d924b5a7daf4043ccea811ca8f424ca1e96f1624c9f840b5422cc6dfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD4 4896 bytes
font_02_sfnt_off0000cea9.bin
84ca8610392484f604a65d44e2845239a6d6a1d1527517060401fa2ac07f19a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA9 10500 bytes

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