Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e99ef9c7b6a467…

MALICIOUS

PDF

72.9 KB Created: 2021-03-17 15:58:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1974df33a68082fdf509e3664203efd1 SHA-1: 9fbeb0ee1318f1589119db497a356a07c4d97896 SHA-256: 10e99ef9c7b6a4674e515078f3b1b56db39a42960e5d7aba1e031c3cb2bba331
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards exploitation of PDF vulnerabilities to execute malicious code or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/wix?keyword=hdt+sse+framework PDF link annotation
    • https://cdn.sqhk.co/rigowodikot/4hdjghe/23844316971.pdfIn PDF document text
    • https://cdn.sqhk.co/pegebatanuz/5nEwhiW/lalevuduxonidemiraga.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/2203037.pdfIn PDF document text
    • https://belatefa.weebly.com/uploads/1/3/0/7/130775380/4c3cc7c36fd6b1.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/ghhbjhJ/smule_karaoke_free_songs.pdfIn PDF document text
    • https://gonibokufelari.weebly.com/uploads/1/3/5/3/135346176/7706978.pdfIn PDF document text
    • http://vozajomaralamer.mygamesonline.org/axial_flow_compressor_design.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxujagemo/uamgjih/carbon_nitrogen_phosphorus_cycle_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/gWhcsgh/nvidia_games_apk_mod_android.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/Qhjidjd/75506219799.pdfIn PDF document text
    • http://perevod-card2card24.site/non_conformity_report_xlspm74k.pdfIn PDF document text
    • http://zixudivibudizu.scienceontheweb.net/lujalixitorewod.pdfIn PDF document text
    • http://nesobaka7.xyz/9719355729937t3m.pdfIn PDF document text
    • https://laregupofonel.weebly.com/uploads/1/3/4/4/134464195/1384648.pdfIn PDF document text
    • https://cdn.sqhk.co/jovakuki/aCNHTgc/jumpstart_booster_box_price.pdfIn PDF document text
    • https://cdn.sqhk.co/jekidase/Yiehbji/sonic_hedgehog_wallpaper.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/mepegefoje.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/3CIihF0/download_sculpt_mod_apk_lightroom_full_preset.pdfIn PDF document text
    • https://cdn.sqhk.co/penutizufib/bid0Tih/mivume.pdfIn PDF document text
    • https://cdn.sqhk.co/wofosavafiju/ihzkghY/cross_bridge_formation_atp.pdfIn PDF document text
    • http://xuroriwonufuz.scienceontheweb.net/kiruvapenadubufosopiweder.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE088 5140 bytes
SHA-256: ab5e7cbcb2d1e3234097e37a69aeb487593a2c65576ef02fcf75ce8d45d27371
font_01_sfnt_off0000f1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FF 10688 bytes
SHA-256: ac299dbb5115da66e2ab1199e89deca69db797bd2febae6221ae2a98b847f27f

Open this report in the interactive analyzer, or submit your own file for analysis.