Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e699390681b6c3…

MALICIOUS

PDF

72.8 KB Created: 2021-02-14 23:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d32d9209ed207311e973b6f309ec7231 SHA-1: ee83ca7537c8401b3211b8bf2a6276b14ccdb63c SHA-256: d7e699390681b6c3291cf04c2392b8bd83d64599628fb1030b88e57fc0e1eea5
134 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of a 'download button' heuristic further supports the attack pattern of luring users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=armed+heist+hile+android+oyun+club PDF link annotation
    • https://gedijidejejew.weebly.com/uploads/1/3/0/7/130775336/679f697b48e3.pdfIn PDF document text
    • http://santaparker.store/2015_cadillac_srx_performance_reviewc8z98.pdfIn PDF document text
    • https://lefafikof.weebly.com/uploads/1/3/0/9/130969708/736575.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409998/normal_5ff33cc373303.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378855/normal_600573fc18bf9.pdfIn PDF document text
    • http://makamar.xyz/cancionero_para_guitarra_enq0her.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370052/normal_5fcef86b8f875.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/4794096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450047/normal_5fd613f7e0691.pdfIn PDF document text
    • http://center-about.com/duturijerafanigubej3eucs.pdfIn PDF document text
    • https://zugufirit.weebly.com/uploads/1/3/1/1/131163535/xonero.pdfIn PDF document text
    • https://bolukuja.weebly.com/uploads/1/3/0/7/130739437/vutavif_xagiresosofu_fopavibixemop_xedileza.pdfIn PDF document text
    • http://copyrightprivacy.site/gabriels_oboe_organ9y5fo.pdfIn PDF document text
    • http://fuckfrsky.com/free_bangladeshi_comedy_natok_v_3gpqekhc.pdfIn PDF document text
    • http://sumomubidisuwo.iblogger.org/badrinath_ki_dulhaniya_movie_video_songs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://novoniranalisa.epizy.com/classifying_and_balancing_chemical_reactions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/vasobivetexasivesegumak.pdfIn PDF document text
    • http://newubopuga.epizy.com/sewing_bag_patterns_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/wubulofutidesajuro.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/hcv_guidelines_easl_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/tajejebojajonolapixo.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_off0000dc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC23 5412 bytes
SHA-256: 2795e632e16674e93c128af07803b1d450dc30e6137fd059710fc0ce94138b81
font_01_sfnt_off0000ee60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE60 11912 bytes
SHA-256: 3af45fe65df5ee1ee0f774c0b9f53e7cdf696c49a42d883ecb8e412e5fe74425