Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e516920e08771c3…

MALICIOUS

PDF

67.4 KB Created: 2021-01-16 11:04:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 934d51135c17396e522e537678fb97d1 SHA-1: 3b4aa98332f795d2e9d0571146486d6e8ca47e41 SHA-256: 2e516920e08771c384a7e8dfff86f674634649a1f3dbf199179d6eaf0c11aeb1
126 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous external URIs, with one specifically pointing to a suspicious domain 'traffnew.ru' that is likely used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'travel information' or a similar pretext to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffnew.ru/aws?utm_term=ajari+aku+mencintaimu PDF link annotation
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/9daccfe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497359/normal_5faf3605ee640.pdfIn PDF document text
    • https://site-1211946.mozfiles.com/files/1211946/spirit_airlines_travel_information.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412588/normal_5f9ed1446abce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466166/normal_5fee87e248935.pdfIn PDF document text
    • https://site-1194448.mozfiles.com/files/1194448/android_10_custom_rom_for_oneplus_3.pdfIn PDF document text
    • https://cdn.sqhk.co/dozirolizilu/hjasif8/kukugozolakaziro.pdfIn PDF document text
    • https://site-1175602.mozfiles.com/files/1175602/muzujatuvomepelemubapuki.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/hzchhhh/flight_simulator_2018_pc_game_download.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/muvazi/jinunadar.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC10 4864 bytes
SHA-256: c319465930e90d3b59d404858a72c42b6f9bac1ca737cf1eb2a34ec56102d055
font_01_sfnt_off0000dc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8E 10328 bytes
SHA-256: a84e6dde9f2240523341fd68190fd2f0c4e8c8d1c2cff39495ee3b1593056fa7

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