Malicious PDF — malware analysis report

Static analysis result for SHA-256 a54de7fc36cd16ab…

MALICIOUS

PDF

74.2 KB Created: 2021-03-05 10:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 7781b64f031545708590446d83a22366 SHA-1: a628f3287ab5b0821735508badf5a2c643896843 SHA-256: a54de7fc36cd16aba17ed5200f0e3e49b7d4c1ef34d99065d0c790f67f86e9fe
196 Risk Score

Malware Insights

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

The PDF file contains a link farm and an SEO redirector disguised as a worksheet, indicating a phishing or malware distribution attempt. The presence of multiple external links and the ML classifier's high confidence score suggest malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jumiwimov.ru/strik?utm_term=8+times+table+worksheet+pdf PDF link annotation
    • http://toteganutiv.66ghz.com/44503255934.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/he6vphe/best_nasheed_2020_offline_football_games.pdfIn PDF document text
    • https://cdn.sqhk.co/sojetaji/gjw0YD9/buzz_cut_with_beard_fade.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/AFaGhf1/3479276450.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8ecf7690-1f99-4e28-a4b6-3228ba9731d7.filesusr.com/ugd/63d3ad_7644806b8abc4810ada3188d010a1b95.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legenapi/chitralekha_kannada_movie_songs_free.pdfIn PDF document text
    • http://gikutixutawax.epizy.com/leisure_bay_spa_manual_celebrity.pdfIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_037093bb915c4a5bb78c1d07e6b4cce4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tudawufed/mowosexugo.pdfIn PDF document text
    • http://vesebiven.rf.gd/arduino_uno_pins_0_and_1.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/shell_sort_algorithm_with_example.pdfIn PDF document text
    • http://kirotomi.epizy.com/c_e_s_ltd_annual_report.pdfIn PDF document text
    • https://a22c3535-4c29-4f26-bf6b-1e631d3648e5.filesusr.com/ugd/28986c_bfed327cb1444108849c19d9c0ac7ea9.pdf?index=trueIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_e2360334237347708bfec6f18ddc4b6e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/facetime_free_for_apple_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/dota_2_invoker_mid_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/wedejavelazogufukeb.pdfIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_83108ef288094a95ac27090d4e75017c.pdf?index=trueIn PDF document text
    • http://darewuxopasog.rf.gd/34557763784.pdfIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_2911692ba8f14b4fa76afc38f7f376ca.pdf?index=trueIn 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_off0000e4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C0 5676 bytes
SHA-256: 8d888c1141c8ecf6844192dfcf92c5ad8e636cafbadbd56b018680dd05242b33
font_01_sfnt_off0000f7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EC 10556 bytes
SHA-256: 55709c889a37e2807278e892c818ac9ee29b60ecbd274f3b7ad5cea6871e1e28