Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e15c7af13ade12…

MALICIOUS

PDF

77.4 KB Created: 2021-03-07 06:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f22bedcd578afec06c262bb8b64d21ad SHA-1: 2a2543b80f5f28c083630f3c35623f02855167d2 SHA-256: d7e15c7af13ade12e1a894a43dfc0ceccb8557f230687c0d7959b12f37008be8
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing lures and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://seumenha.ru/aws?utm_term=the+end+of+the+f+world+season+2+episode+1+watch+online PDF link annotation
    • https://cdn.sqhk.co/bigulikexupa/jejehiO/guide_for_pk_xd_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/HtMiajb/pica_pica_candy_ingredients.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/jdjdEma/fury_survivor_pixel_z_mod_apk_happymod.pdfIn PDF document text
    • http://pixuvuxojatob.iblogger.org/bahubali_movie_comedy_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/heigu0X/download_video_twitter_tanpa_app.pdfIn PDF document text
    • https://poxanada.weebly.com/uploads/1/3/1/4/131483305/karip.pdfIn PDF document text
    • https://lipulutopokun.weebly.com/uploads/1/3/5/9/135964399/kimov.pdfIn PDF document text
    • https://dirojobadenanew.weebly.com/uploads/1/3/4/1/134109317/9ef2c.pdfIn PDF document text
    • https://ledatomonuv.weebly.com/uploads/1/3/4/6/134686063/37cd3d7cc.pdfIn PDF document text
    • http://gofimowekes.66ghz.com/yankees_players_weekend_uniforms.pdfIn PDF document text
    • https://rifewageza.weebly.com/uploads/1/3/5/3/135349229/geserati.pdfIn PDF document text
    • https://xuwirebusupedun.weebly.com/uploads/1/3/4/3/134379604/tevexewuloseriwugu.pdfIn PDF document text
    • https://xovigojimere.weebly.com/uploads/1/3/4/8/134854331/791b7c8.pdfIn PDF document text
    • https://cdn.sqhk.co/faxinomitux/ijrxhf9/cnc_router_table_4x8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vigonodiso.rf.gd/fifty_shades_of_grey_music_free_download.pdfIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_844aec64b6714f96b18f9c8c3145af33.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefunupu/pizegusalun.pdfIn PDF document text
    • http://felepav.epizy.com/mugabom.pdfIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_90a6c54415314eb380f46d2c4c1423c7.pdf?index=trueIn PDF document text
    • https://efed9c07-4553-4484-a419-1b844d271aeb.filesusr.com/ugd/6f475a_8c633f0508af488d9fcc8408f791cc9c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lakadutof/vodowopajo.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/59338969305.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_off0000efac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAC 5468 bytes
SHA-256: 69eccc293879275af0948d10348036a97fb457e4cd656d96447b99fc0ffc31a5
font_01_sfnt_off0001025f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025F 10992 bytes
SHA-256: 5dbde02453e6fd8d4d45e8ffccab6a895e1523fd8b7ad8cc3ef8f7e29d39c051