Malicious PDF — malware analysis report

Static analysis result for SHA-256 f090353cc2349605…

MALICIOUS

PDF

105.7 KB Created: 2021-02-26 18:35:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 54c05536c68b9bfe61b1acc2e6537683 SHA-1: 2b888531dfc0c78fdd4b09de990c07b376819454 SHA-256: f090353cc234960508d1e5ba9483f669eba02de667ae8b136a5a51821a5a0266
196 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is part of an SEO link farm and a phishing attempt, specifically using a "free download" lure. The embedded URLs point to domains commonly associated with malicious activity. While no scripts were explicitly extracted, the PDF structure and URL patterns strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://dugedepap.ru/award?keyword=java+swing+gui+builder+free+download PDF link annotation
    • http://lapitubemexidi.mywebcommunity.org/30511515645.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/asmaul_husna_lengkap_dan_artinya.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/17221430344.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/cobra_microtalk_walkie_talkie_troubleshooting.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/kevogozekos.pdfIn PDF document text
    • https://jedurabononip.weebly.com/uploads/1/3/1/4/131453193/ganokul_saposawem_vopinu_kelubovowe.pdfIn PDF document text
    • https://xinulirolome.weebly.com/uploads/1/3/4/5/134599248/sumowoduneba-kafejokalipifu.pdfIn PDF document text
    • https://tikekukitalil.weebly.com/uploads/1/3/2/7/132712015/podifigitizar.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/dell_optiplex_790_network_drivers_windows_7_32_bit.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/famesexavenasefusi.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/xipavir/applying_the_activity_series_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/sixusoxubamolona.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/rasavew.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/christina_perri_human_audio_song.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/xasam.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/78655079203.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16304 5356 bytes
SHA-256: be4fe4ae2eab8e7d8e286d01399c642b3765b0681c7a390002e19e50db9ce96e
font_01_sfnt_off00017560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17560 10476 bytes
SHA-256: a558ff572ad2a91e5f3a432587030185bf36dbb0ef72a002810f0b61a02517d0

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