Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb34700e785dd15…

MALICIOUS

PDF

83.5 KB Created: 2021-03-08 03:34:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 112a7ffb2f6e5f27752803288bde9b4d SHA-1: a71353164015150368f9ac2c1a0392eae37ee696 SHA-256: 0fb34700e785dd15bddc67280d91dca321557d667345e8eb17e16730625e782f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. ClamAV and ML classifiers also flagged this file as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://leonvi.ru/aws?utm_term=sociopath+next+door+chapter+summary PDF link annotation
    • https://kaxitojuwomig.weebly.com/uploads/1/3/5/3/135302818/57bc9478635f.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/c7055bfe34.pdfIn PDF document text
    • https://vunivejo.weebly.com/uploads/1/3/4/2/134266425/521f24.pdfIn PDF document text
    • https://sifijaxamop.weebly.com/uploads/1/3/4/3/134332722/26509ac05.pdfIn PDF document text
    • http://my-favshop.online/is_mauritius_visa_free_for_nigeria8hjmu.pdfIn PDF document text
    • http://goodnatural.space/877991821571m8no.pdfIn PDF document text
    • http://phillipen.online/the_story_of_one_piece_in_30_minutes3vxb4.pdfIn PDF document text
    • http://jegotaraxipux.iblogger.org/pretty_little_liars_netflix.pdfIn PDF document text
    • https://doxeraja.weebly.com/uploads/1/3/1/8/131871607/duxovizude.pdfIn PDF document text
    • http://xakubilowiva.22web.org/who_is_sam_i_am_in_green_eggs_and_ham.pdfIn PDF document text
    • http://rollernefrit.xyz/8153373860227knw.pdfIn PDF document text
    • http://storeyou.store/acer_aahd3-vc_motherboard_manualvgro6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jifejibi.epizy.com/liwivat.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/what_is_social_work_and_its_functions.pdfIn PDF document text
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_eb254e49f9754c7fbe405611132e14bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/herbalism_guide_wow.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/online_admission_form_for_du_sol.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/christian_worship_songs_2019.pdfIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_2b75c78c3f954a8996c33283ac08bf82.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/2680613279.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/please_find_the_attached_excel_sheet.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_4ed57792f4b74ebdbdea3a132d044e96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/amway_atmosphere_air_purifier_manual.pdfIn PDF document text
    • http://peragodifi.epizy.com/dd_3.5_equipment_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/genie_user_guide.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_off0001093e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093E 5556 bytes
SHA-256: 20d2d1a43f75f424312374e5fb670ba1f2178ddef56f864d518a4d722362405f
font_01_sfnt_off00011bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFE 10796 bytes
SHA-256: d8fb6dc2b594d22676923eaf245f13f4cd6b51b584823ff896309e3e1a33d239

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