Malicious PDF — malware analysis report

Static analysis result for SHA-256 909b93cfa43f27b3…

MALICIOUS

PDF

75.5 KB Created: 2021-03-19 18:03:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e704a21ede748185f18597e539f287bb SHA-1: e104928f38a9c1ec7d9cb6e87e11e8cda87a4ec3 SHA-256: 909b93cfa43f27b3588189568e2bf2a33a8efa336e046f3d35eb628d10a76094
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 suspicious domains and are flagged as part of an SEO link farm designed to distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain keywords related to tutorials, suggesting a lure for users seeking information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://bologen.ru/award?keyword=asp.+net+ajax+control+toolkit+tutorial+pdf PDF link annotation
    • http://itverys.space/fuwososuraje4kvyy.pdfIn PDF document text
    • http://bigno.space/popular_woodworking_magazinewqpqd.pdfIn PDF document text
    • http://kudretbozaci.com/291079938067rg09.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/22649914653.pdfIn PDF document text
    • http://priz24.site/select_the_statements_below_that_are_true_for_light_wavess5pun.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/trigonometric_identities_for_class_10.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/books_online_for_free_to_read.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/swallowed_foreign_body_guidelines.pdfIn PDF document text
    • http://prosucre.pro/votupk9nuf.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/how_to_spotify_app_on_macbook.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/abdominal_aortic_aneurysm_classification.pdfIn PDF document text
    • http://trujillostacoshop.com/excel_vba_find_last_row_in_specific_columna9fgx.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/vopumuma.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/zarixuniwoxa9wvgi.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/famidezogekowa.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/2008_jeep_grand_cherokee_srt8_common_problems.pdfIn PDF document text
    • http://rankingcoach-apps.com/79571103280tnmoo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d4c7cc59-fb99-4fe4-94a7-829126106b80/repair_jenn_air_gas_cooktop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b003f307-90e2-4b94-be48-2ab018e97db6/how_to_read_lausd_report_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db821d8-ab74-461a-b62b-d7213020006b/tinafojewodoligiv.pdfIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_09bf4f81147c49339f08b2d164831e93.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc0dc23-6bc9-42cc-aab3-bda58d371f58/how_to_sync_harbor_breeze_fan_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1469256-8ab1-4567-bc4f-73cb5c6cd743/vowulajanewavo.pdfIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_c6434ee0690f41848f86336a008964d5.pdf?index=trueIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_7f9b5e3e9b3c46ae84aadbc5b0280e75.pdf?index=trueIn PDF document text
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_6aae26b2051d4b30bd7ea3b4ba3dad43.pdf?index=trueIn PDF document text
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_ccba4e14106e42058b8c017ea30f9272.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7E 5260 bytes
SHA-256: 48cd143bf1b4ea9625be07e956462baa557ad8d42addc8c44e7bd2f1f1b01951
font_01_sfnt_off0000ef74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF74 10096 bytes
SHA-256: 1ea62f002821f61f3712306b459469daf682b7f6d080519d8694269e9edb7c8a
font_02_sfnt_off000111e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378