Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ded467412542532…

MALICIOUS

PDF

75.3 KB Created: 2021-03-09 04:05:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0dbd623a5526d58c12ba5256cfb5b433 SHA-1: a2280d92b2369e3c60507319509472ed195ecc7f SHA-256: 8ded467412542532defd7742b0ab17aa9ea32aeee94159aa700241fc018074f1
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or trojan delivery. The document body, though heavily obfuscated, contains keywords related to downloads, reinforcing the lure.

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 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://dugedepap.ru/award?keyword=mariadb+tutorial+pdf+download PDF link annotation
    • https://cdn.sqhk.co/dudugetogi/jj4jiIr/nibabobofozu.pdfIn PDF document text
    • https://fixaporaxaju.weebly.com/uploads/1/3/1/4/131413905/dc0669e6d4.pdfIn PDF document text
    • https://xezinazilasiza.weebly.com/uploads/1/3/4/3/134319357/xenotukeke.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/jea58gg/geometry_dash_subzero_level_editor.pdfIn PDF document text
    • https://cdn.sqhk.co/jepivitixiwo/ajeSxhc/nefev.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/hXgeihz/14693938389.pdfIn PDF document text
    • http://livelaj.iblogger.org/fexalozinetebalu.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/jetiblF/vozavalavidoligolijujiji.pdfIn PDF document text
    • https://cdn.sqhk.co/kapipota/hehahhQ/suwozeza.pdfIn PDF document text
    • https://digojumowixev.weebly.com/uploads/1/3/5/9/135989627/kujuduzifu-rebukitomozag-dewifemor-zefow.pdfIn PDF document text
    • https://bajawefigorega.weebly.com/uploads/1/3/5/3/135339811/1771401.pdfIn PDF document text
    • https://cdn.sqhk.co/powosinubuk/SUih1V4/9105078624.pdfIn PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/7049504.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_b71206cb4bf341a7bfd9e14fe17c5590.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legesiliv/ribijujefijug.pdfIn PDF document text
    • http://gejagixuz.epizy.com/semore.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/washington_hunter_safety_test_answers.pdfIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_bc573cde686a4400bf541765d59d3c1e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosego/29988854203.pdfIn PDF document text
    • http://zovodubevonul.epizy.com/24310958911.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_off0000eb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5D 5096 bytes
SHA-256: 4dfcf2879d5fa7eaf5fc1bc148e63702893c6118786b450c8557aacc589d9ea5
font_01_sfnt_off0000fcd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD6 10444 bytes
SHA-256: 71dd2f87c2ea2b8005280c6d0a33ba55b8e06bd56c8952daa7badef2d0d58838

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