Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e6d02c15e6d176…

MALICIOUS

PDF

76.0 KB Created: 2021-02-06 08:20:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6641f1922faf80a419470252b9b65a38 SHA-1: f0ff1b37dfc613d491f00f7dc5bf3dda572853e9 SHA-256: 70e6d02c15e6d176e873da59a813835a3bd79f3dccadcffb47b0c95faced8d1c
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains an external URI pointing to a URL that appears to be a lure for downloading an Android application, specifically 'spotify premium apk'. The presence of numerous links on disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=best+android+spotify+premium+apk PDF link annotation
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/zibuka.pdfIn PDF document text
    • https://cdn.sqhk.co/naveropifo/gjmkolR/guvatemarid.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/HigZfKb/knife_thrower_circus.pdfIn PDF document text
    • https://monokuzofo.weebly.com/uploads/1/3/2/7/132741222/587152a5b.pdfIn PDF document text
    • https://gilanevevo.weebly.com/uploads/1/3/0/7/130739192/1683856.pdfIn PDF document text
    • https://cdn.sqhk.co/fedijadika/yif6qiN/23923694762.pdfIn PDF document text
    • https://bobusenig.weebly.com/uploads/1/3/4/8/134866704/monewizijane_gugoge_toginavuje_xapedisugexev.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/ijaHgh2/dynamons_2_by_kizi_hack_download.pdfIn PDF document text
    • https://wojumujar.weebly.com/uploads/1/3/5/3/135396772/gigoxebavo.pdfIn PDF document text
    • http://tufilevazoropiz.iblogger.org/bolesevixenarope.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/pulujolatepuv/nitibativewubab.pdfIn PDF document text
    • http://zoberutobaf.epizy.com/axe._io_mod_apk_1._3._3.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/formule_brute_definition_simple.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/abr_holdings_annual_report_2018.pdfIn PDF document text
    • http://vodobugatusexa.epizy.com/24337937790.pdfIn PDF document text
    • http://kavolimuteso.epizy.com/2011_chevy_equinox_ltz_owners_manual.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_off0000ebe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE0 5368 bytes
SHA-256: 6f2ede3813cd7fbba3ad081fdd50b13aa06ebf95f189105c8efc752dd06dea2d
font_01_sfnt_off0000fe20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE20 10680 bytes
SHA-256: f6228ba1bda02aebabc0bc0a00373b4f8c1825cdcefea05accbfb457794ce0d4

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