Malicious PDF — malware analysis report

Static analysis result for SHA-256 a86897d5530ce5bb…

MALICIOUS

PDF

138.5 KB Created: 2020-12-22 04:54:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9c18568007ed08678bcd7a2f50d58a2d SHA-1: 83a4e630b6cdf2e7fae4119b386b42bd6c8a8bb5 SHA-256: a86897d5530ce5bb08f8fdb6e6d5cff7c5f23afca04ad53c8ffb3e296b2197e3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The embedded URL, 'https://traffset.ru/aws?utm_term=indian+railway+time+table+free', is likely used to deliver the malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Indian railway time table free'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=indian+railway+time+table+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384150/normal_5f9436c77f0ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445331/normal_5fa86785d5494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454821/normal_5fb03445ce2e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453102/normal_5fc602f4a9899.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/46ec7ed5-4117-473b-8cfb-fdebcb8a473b/54751260219.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/33561583932.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/luminajexomisetumib.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/92434015878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b682b7-4feb-4c1f-8ca6-ac397542f66e/ff14_carpenter_quests.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/nokia_4._2_android_10_update.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5453dd49dd12447511837/t/5fcd4c3874a40730fba7a09e/1607289912819/amc_citrix_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa2b55eb-3070-4e65-a628-1e5ade6c16bf/91435121735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d431e897-dac1-412c-8d10-dd019a2edb8c/32334008047.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/restaurant_business_plan_template_word_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7b47e8-fb32-4f4f-88a1-10786ba523db/rolagezimekazoxel.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D3AF 6744 bytes
SHA-256: ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425
font_01_sfnt_off0001e497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E497 5144 bytes
SHA-256: 60d4f175348d86beedcab30356820259047e8348062809c9ee57dfa44c3f3312
font_02_sfnt_off0001f616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F616 11440 bytes
SHA-256: b6cd41b1e488dea6f0799a194910e0de673379f17f0b4a30762b9135f7538a4c

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