Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a973c271c37006c…

MALICIOUS

PDF

96.6 KB Created: 2021-03-27 20:15:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2ed7d95a8bbe9f20c1c1d1a1c4255090 SHA-1: c99f9153804bf07718ed21c3739fe210bf30f5f4 SHA-256: 0a973c271c37006cf54d45e784592ac726183a056a0c04c383eade4fe1663bf6
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. The presence of numerous external links, including one pointing to a redirector at 'https://zajinet.ru/123?utm_term=banalata+sen+poem+in+bengali+pdf', suggests an attempt to lead the user to malicious content. The document's structure and link farm characteristics point towards an SEO-based lure for free downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://zajinet.ru/123?utm_term=banalata+sen+poem+in+bengali+pdf PDF link annotation
    • https://wexokoxenasebun.weebly.com/uploads/1/3/1/4/131406289/de477b6ef92.pdfIn PDF document text
    • https://pixamowogiru.weebly.com/uploads/1/3/4/5/134590731/mafikaf.pdfIn PDF document text
    • https://pazudafodimaje.weebly.com/uploads/1/3/0/7/130776249/vedatafikide-rusiri-wapof-gaxojoba.pdfIn PDF document text
    • https://gerasulas.weebly.com/uploads/1/3/4/8/134861388/f419add9ead.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_2137c6039b4c401fbabe6ff93abb4a1c.pdf?index=trueIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_5e2b5294f3144975beda5d7a0edd7e67.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c84f541-ef81-40e6-aaa6-83fc534c813e/what_is_basic_chemistry.pdfIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_3e311c94d7f047e59e97643d3cf2d622.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/78885239657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8445e20e-81c4-4497-850b-57ac852e516e/social_constructionist_theory_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/2625798481.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/rockwell_1769-l33er_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95317728-fa14-4748-8920-0c1830529e57/descargar_los_juegos_del_hambre_saga_espaol_latino_mega.pdfIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_eb1a797842da4c47ab123864629e9ed1.pdf?index=trueIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_e8861717ae13497999815104f9004106.pdf?index=trueIn PDF document text
    • https://a1b876fd-e98f-4594-996d-fc523792ae9e.filesusr.com/ugd/efcbf0_3c97db2c85db46408bb91344fb80c278.pdf?index=trueIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_33dd91edbc9e41a5982da2adf14ffd89.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jotizifime/95552754811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b49d6e5-2efd-445a-870e-d7debf2261e7/2012_sonata_hybrid_battery_location.pdfIn PDF document text
    • https://06e27459-8a58-4d01-a48e-f853eab966f6.filesusr.com/ugd/55f1a0_278d2a7c10cb43159c149b5a20487bf2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jinabom/tratamiento_nutricional_para_anorexia_nerviosa.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FD 5452 bytes
SHA-256: df19302d0127c4168caf5ac86b0a84b05831c36160c9d4be88817483689f211e
font_01_sfnt_off00012377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12377 14144 bytes
SHA-256: 350409b55894471b67bd3a4a6e35584a39c031af12b43a56072cc56778142274
font_02_sfnt_off00014e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E75 11296 bytes
SHA-256: 8a79ef061fda44867eae4b9694c9350efb5df3922ecb27a22b5590d72ed24b44