Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bbae2977a359e0d…

MALICIOUS

PDF

82.3 KB Created: 2021-01-21 06:57:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cbe4e9d046fdff84d6afe6e21ab696c0 SHA-1: c3826ab3ab9dbfb07f4ef1b104237fc730b41a92 SHA-256: 6bbae2977a359e0dbc8681b8cfba694e04f4410897e5bff6a1c3df9381d55e59
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and heuristics indicate it functions as a link farm, likely designed to trick users into downloading malicious content. The presence of urgency and payment-related language, combined with a call-to-action button, strongly suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent, potentially leading to the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafficel.ru/123?utm_term=wwe+champions+apk+%252B+data PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382958/normal_5f8fb06c18c29.pdfIn PDF document text
    • https://site-1168130.mozfiles.com/files/1168130/alan_walker_song_with_lyrics.pdfIn PDF document text
    • https://site-1221887.mozfiles.com/files/1221887/rogobunip.pdfIn PDF document text
    • https://site-1171472.mozfiles.com/files/1171472/samokefovazifek.pdfIn PDF document text
    • http://bajuzupur.22web.org/smells_like_teen_spirit_guitar_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476943/normal_5ffd52fc98e90.pdfIn PDF document text
    • https://site-1177169.mozfiles.com/files/1177169/touchgrind_skate_2_full_apk_2020.pdfIn PDF document text
    • http://davilebut.66ghz.com/itlu_anjali_movie_songs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491152/normal_5fb36f216a37c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452588/normal_5fd06371afbe0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_5fb61252d4918.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471109/normal_5feb8155f05d0.pdfIn PDF document text
    • https://site-1174404.mozfiles.com/files/1174404/93475533297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385863/normal_5f9074154fed6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379855/normal_5f8b713b0bbf1.pdfIn PDF document text
    • https://site-1179246.mozfiles.com/files/1179246/xesikivutoxufesenijuvex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471238/normal_5faf53cb27ff1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rusozetowozo.epizy.com/torapigupefiwub.pdfIn PDF document text
    • http://rosukijabadizi.epizy.com/61270998056.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF651 3256 bytes
SHA-256: 1d78173dad5c7f1ec59ecb7d0671f83bd3f379303afcbcf9a6b11c77116add05
font_01_sfnt_off00010212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10212 5352 bytes
SHA-256: 59749ee1ce682f085461851d0a17e90b9a2f3e7a5e3d9d058d1b2607988c072e
font_02_sfnt_off00011438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11438 11660 bytes
SHA-256: b6a53495a6b9b863e6dad7acfc9c56821dbf4269798ac9fda3b2c3e794e2ff08