Malicious PDF — malware analysis report

Static analysis result for SHA-256 d81ab425807a17fc…

MALICIOUS

PDF

43.9 KB Created: 2020-10-25 23:20:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7ae2a009d8da8e73214373a2359aec5b SHA-1: d708e846c1e4a1041164003283e9c0515ca90b98 SHA-256: d81ab425807a17fc6736bf49dcb6350ec21edf6f377e67f1085170bd003c19ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?keyword=astride+vault+pdf In PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/zegomotagenig.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/780967.pdfIn PDF document text
    • https://luleloneluso.weebly.com/uploads/1/3/4/4/134450102/vebeg.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/5189562.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/dobat.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/jepoveg.pdfIn PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/mogipekok-rogifedotemewag-folebefogumuw-gilewesiwu.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/1949415.pdfIn PDF document text
    • https://beperiguvo.weebly.com/uploads/1/3/4/3/134320750/cd085cb828e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zerepuzuze/68962138913.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/39195734838.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/avani_avittam_yajur_veda_2019_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/chemistry_revision_notes_igcse.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/conjunction_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/motor_insurance_policy_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/30007194794.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/45898013549.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/aulas_de_ingles_em.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/61434334193.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000605d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605D 4748 bytes
SHA-256: e6a21e60a8f0556825d7725c203138e917febf9195cd53a06c8cccb2ed4a5be6
font_01_sfnt_off00007091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7091 10408 bytes
SHA-256: 8640e9564832b440176b25828144f0f2fdddca2ce8eb8e50984c24655250d854
font_02_sfnt_off0000944e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x944E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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