Malicious PDF — malware analysis report

Static analysis result for SHA-256 3002a70e4a39f625…

MALICIOUS

PDF

77.8 KB Created: 2021-05-16 03:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01084d5dcbecb9f1c37f4b0de1a4de2d SHA-1: e10f568b7e4f3a905953279cd5a6d92014fd2577 SHA-256: 3002a70e4a39f62521d28e00d335ac41ef5b87dd975be880481ae1ce1c186632
186 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam tactic. The embedded URLs point to sites that likely host malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wb?keyword=keurig%20b40%20filter%20change PDF link annotation
    • http://vilurusunus.22web.org/apache_poi_java.pdfIn PDF document text
    • https://vuguzunorofina.weebly.com/uploads/1/3/4/3/134322364/fimewa_sirububilape_zugopaponulizi.pdfIn PDF document text
    • http://x-bionic.shop/800611651064xjyc.pdfIn PDF document text
    • http://begdas.space/biochemistry_viva_questionsen884.pdfIn PDF document text
    • http://padazaj.iblogger.org/autocad_2019_tutorial_second_level_3d_modeling.pdfIn PDF document text
    • http://nefritthebestthing.site/18297422054pn7yk.pdfIn PDF document text
    • https://webebusili.weebly.com/uploads/1/3/0/9/130969565/mojupafutu.pdfIn PDF document text
    • http://golosa-spasibo.ru/21618248719lw1yp.pdfIn PDF document text
    • https://tutuludoj.weebly.com/uploads/1/3/0/8/130874598/4156273.pdfIn PDF document text
    • https://zikotidule.weebly.com/uploads/1/3/4/6/134604350/485ee1d7a53.pdfIn PDF document text
    • https://zeteparikimifol.weebly.com/uploads/1/3/1/6/131637109/tobutubotoruwezexa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://198ac300-f2de-41a8-aaa9-2df0d2bfefbb.filesusr.com/ugd/232b71_f94b164e81b244dcafc48d23a91794b0.pdf?index=trueIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_96d3781622084c578971871d9a3eeab2.pdf?index=trueIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_5d74748da2804dc8beb584252269ab1d.pdf?index=trueIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_1e9bbde7d1c94797892710fa7fa67ed2.pdf?index=trueIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_00c82b9b52a447948295478e65594fc5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d258478a-dadf-4c50-90d2-3c3594aa84d4/jojuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b960fdb-9012-4750-873a-ec696618c454/associated_laguerre_polynomials.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9103dcb2-8e0b-4ae7-a33c-4b0ae6ef932d/tokuzado.pdfIn PDF document text
    • http://sitejaxikezo.epizy.com/pedasojenapu.pdfIn PDF document text
    • http://rowexaj.rf.gd/mit_app_inventor_2_android.pdfIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_253844cbe0444a158a8e175c170576bd.pdf?index=trueIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_5a80ff2a61d3472384984f0a6e474381.pdf?index=trueIn PDF document text
    • http://zonavopom.rf.gd/texans_injury_report_2017.pdfIn PDF document text
    • https://07f52280-50dc-49c2-beec-a2e30bf849d0.filesusr.com/ugd/7b8f90_d5c9f8d420a942ebb093e6d4b161b546.pdf?index=trueIn PDF document text
    • https://1bc2da55-d9f9-46f5-9d67-b48dc82c85d4.filesusr.com/ugd/957ce7_bb899532f5264ab3b972746d674ebc82.pdf?index=trueIn PDF document text
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_096f6c91f0de4b47837f976583c58d60.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ef9014f-27ce-4fdf-9806-928896e25580/dugusajutedubituveji.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 5304 bytes
SHA-256: 74c5e62f18278481ec8bbe369b8b2904c0818eb284b1a1ef638d80a407b98fa4
font_01_sfnt_off000103db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DB 10932 bytes
SHA-256: d1de8cfd14bf013e22ad09968456c4fd080633544361692907de57d192a410a8

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