Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1aa37b1a11a5beb…

MALICIOUS

PDF

70.8 KB Created: 2021-01-02 08:39:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4c957fa93e7482477bf5ce9d5982c5a4 SHA-1: 7b6c4aee19e426192643755ad5f78755de95f639 SHA-256: e1aa37b1a11a5bebe7df0b945aa13a60682a327f616c6a6522fecb481f57232e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. The document body, though heavily obfuscated, appears to reference a career fair schedule, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=tamu+career+fair+schedule PDF link annotation
    • https://cdn.sqhk.co/wetotuluxe/21hghLN/to_do_list_goal_planner_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuwemiromi/eUYiahw/vexiseludovinunovowisasiz.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/kalanejaxutilif/baby_doll_cartoon_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51640e6c-6768-4efa-a4fb-dcef85eb483e/38078744653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b65e48ff-98b7-4123-b559-68c2713ec518/kojisurowexelilolefaregaj.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/lafuwamirogozoxuwinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3d63234-2730-4339-9699-31504cf20978/hamilton_beach_ice_cream_maker_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be0c0ba5-516c-416e-bcdc-a5120bb6e8d0/77853032162.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/71803758726.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/35768402205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f554d38-2006-4f58-914a-dd00d9a4357a/getijufixazuzetu.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/wonderful_tonight_full_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d723bea7-25b7-49ff-9aa0-5493c7a5c039/nofujut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04ff527d-0c01-4352-860c-023ae98e5957/afghanistan_simulator_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1b50ea8-e421-40d6-8c6d-3018fe03e306/nedidozegomozexami.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_off0000d624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD624 5208 bytes
SHA-256: 2baab50a1bac3699bf765e72644e09db865bd391b73a15384c506fea4bf595e1
font_01_sfnt_off0000e7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AC 11396 bytes
SHA-256: 59b865f8752c4ee0560caebfe2ac65442bb20024fb2d7cbb93e512b80246a345

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