Malicious PDF — malware analysis report

Static analysis result for SHA-256 38de5b6fe3ec97b9…

MALICIOUS

PDF

81.2 KB Created: 2021-01-05 04:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 56fdb396cb813478bf417c67341f2c95 SHA-1: b861c9ee67be65e658502ed7a3213f1b584a1e79 SHA-256: 38de5b6fe3ec97b92997adcc5dffe58817884fa8d4c290667c9051f207f6bca5
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, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, traffset.ru, which is likely intended to host a malicious payload or redirect to a phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/123?utm_term=endothermic+exothermic+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417312/normal_5fe7fea3cca08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/15507149770.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/aathi_kaththi_english_song.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/zaxipix.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/vewagemariluripinuro.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/vejudutotifetajeligapepeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/590d47a7-7f36-464d-970d-bd491cbe48a8/vuditugegakizodarazulaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d88dbaa-3589-4331-8f8a-6a100c20f718/nalevekukifakimuko.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/aurelio_s_pizza_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/bosch_dishwasher_manual_she3ar75uc_08.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd947ff-d4ac-4a46-ac6b-a7b0176229b0/macgregor_venture_22_sailboat_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/rolufunijipotatifoxizajom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b4c8af5-6330-47eb-b3d3-270198305760/related_rates_calculator_sphere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07499c63-6e6c-4123-8955-19af7dafafaa/begaguru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a11da54-e6b3-4e17-8002-eb96680f806d/hp_laserjet_1022_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a9c9d69-b254-404e-a50f-a747f9cab68f/24747097163.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/autothermal_reforming_vs_steam_reforming.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC33 6492 bytes
SHA-256: d2077f5d6d5b1d677d9b6d000eb087611a047961d42ceeb980acba3b54af8b85
font_01_sfnt_off0000ec68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC68 5116 bytes
SHA-256: 5f0d8f20a49431d61046328882d4293031a4188e65a9c6c9f0701823380502ac
font_02_sfnt_off0000fdc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC0 10608 bytes
SHA-256: 8920fbf659d19d4e41d306189fca7e428bb2d886ad9542febbc3d5f579ea61aa
font_03_sfnt_off000121d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D3 16152 bytes
SHA-256: 9dd161ad083bde31f1785977080a21cd00ffd1d65af7312c0685ba069ea0c2ef

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