Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8496124d265c9c6…

MALICIOUS

PDF

83.9 KB Created: 2021-03-23 22:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 38b2e0558e3943a776d078e2361ccecb SHA-1: 45f2dcff73c6366461ba32dfa6cbc5e8d5221df8 SHA-256: e8496124d265c9c6b1773503abbff8faffc06f3ab5183284214b496e5cc9d823
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to redirectors or SEO-optimized content farms. The primary URL, 'https://nipisod.ru/wix?keyword=apk+automatic+tag+editor', appears to be an SEO redirector designed to lure users with keywords like 'apk automatic tag editor'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://nipisod.ru/wix?keyword=apk+automatic+tag+editor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379982/normal_5fd107c4d0505.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428083/normal_5fdbe42c6ceb2.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/gVYigL8/2771361788.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/lefupenirutujulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_600defde0a73c.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/tasazafirokasadegalag.pdfIn PDF document text
    • https://fikadodovawewa.weebly.com/uploads/1/3/4/3/134320255/7064831.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/how_to_make_residual_income_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/uric_acid_test_lab_report.pdfIn PDF document text
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/finukobuzapeja.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/grid_template_repeat.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/zaporekok.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/xovelovuxumomupolexixuz.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/45563204480.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/organic_chemistry_2_exams_with_answers.pdfIn PDF document text
    • https://jikudirag.weebly.com/uploads/1/3/4/0/134040407/1498080.pdfIn PDF document text
    • https://fuselenedirila.weebly.com/uploads/1/3/4/5/134597682/tegewuzekud.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/nerusafidaze.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/wusegas.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/55035971641.pdfIn PDF document text
    • https://cdn.sqhk.co/rowagana/bgjm1jc/fractions_and_decimals_worksheets_kuta.pdfIn PDF document text
    • https://volixezutepa.weebly.com/uploads/1/3/4/1/134131916/kaledij.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/manual_template_indesign_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF612 5236 bytes
SHA-256: 74204f6229fef71d4ac4cc870b74cab9af97b4b105e7008d2f0e3554bc55eab2
font_01_sfnt_off000107cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CF 11028 bytes
SHA-256: a9981af024c56dd02367447b3c0f2d22308204468c28cb0a8c6da69879f1604e
font_02_sfnt_off00012dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD3 16064 bytes
SHA-256: 6f17b99764d671a96c0d2fd0b5f339513c2ddbf7efa5d755f63b897ad21dd613