Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df13caa0a864e36…

MALICIOUS

PDF

39.3 KB Created: 2020-03-08 00:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: 3e13513a35410dfb2e746c3ded8795f1 SHA-1: 48fb5af6da7ef3c49b17135a25228feaad8f0d1e SHA-256: 7df13caa0a864e36eaf433715480f2e9ed5d9512eccfb5c5cf3bf05d15d5621b
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. The document body, though heavily obfuscated, contains references to song tabs and the wkhtmltopdf application, suggesting a lure to disguise malicious intent. The primary attack pattern involves redirecting users to a link farm, likely to distribute malware or facilitate phishing. No scripts were extracted, but the extensive use of external URLs indicates a downloader or redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://new.mgh-r.ch/uploads/1/3/0/5/130543740/130543740.html#another+brick+in+the+wall+tabs+guitar PDF link annotation
    • http://lwkdesigns.com/uploads/1/3/0/6/130621214/9238436.pdfIn PDF document text
    • http://74-123-72-185.mgwnet.com/uploads/1/3/0/3/130323174/lexezurijuwo.pdfIn PDF document text
    • http://danielstorage.com/uploads/1/3/0/6/130605135/saxuxipax_kekazamejopivix_fosexur_birevu.pdfIn PDF document text
    • http://hostmaster.hallandhines.com/uploads/1/3/0/8/130874021/basuluda.pdfIn PDF document text
    • http://bbartbyangelica.com/uploads/1/3/0/3/130323600/c79e6c.pdfIn PDF document text
    • http://yourbcrealtor.com/uploads/1/3/0/5/130542977/wuduzewetatix.pdfIn PDF document text
    • http://mountaineerauction.com/uploads/1/3/0/5/130551341/1884409.pdfIn PDF document text
    • http://mexitem.com/uploads/1/3/0/7/130739930/fujezobotati.pdfIn PDF document text
    • http://odysseus-monitor.noc1.net/uploads/1/3/0/8/130874258/tewup_posul_wuvubejifepor.pdfIn PDF document text
    • http://muziksingapore.com/uploads/1/3/0/7/130776673/nuwelulowu.pdfIn PDF document text
    • http://terraeventssolutions.com/uploads/1/3/0/2/130288629/lirolotepan.pdfIn PDF document text
    • http://ediballoons.com/uploads/1/3/0/5/130539990/wesode_rojigudoj_pulavanumuvibi_womef.pdfIn PDF document text
    • http://yalcinerserhan.com/uploads/1/3/0/6/130639404/233f3f11bda37c.pdfIn PDF document text
    • http://www.cloud9td.com/uploads/1/3/0/3/130313458/519417.pdfIn PDF document text
    • http://pattayapropertymanagement.com/uploads/1/3/0/5/130589036/sugutuzi.pdfIn PDF document text
    • http://metoohouston.com/uploads/1/3/0/6/130605166/25c3a595.pdfIn PDF document text
    • http://untabvel.store/uploads/1/3/0/2/130272389/sotituredi.pdfIn PDF document text
    • http://www.jenniferbarkerarttherapist.com/uploads/1/3/1/0/131070009/01f320a.pdfIn PDF document text
    • http://www.anewjourneyawaits.com/uploads/1/3/0/5/130539204/jeluvovefutup_riduwufito_zivumopigimo_selamaregamewib.pdfIn PDF document text
    • http://soychaiten.cl/uploads/1/3/0/7/130776641/besodoberepemav-pasilajejunesur-pojegobawof.pdfIn PDF document text
    • http://fintechinvestmentbanker.com/uploads/1/3/0/4/130483350/270855.pdfIn PDF document text
    • http://www.mbradfordhealth.com/uploads/1/3/0/8/130873995/tuzuliwibufakepo.pdfIn PDF document text
    • http://gifts2go.shop/uploads/1/3/0/7/130738506/9199352.pdfIn PDF document text
    • http://kresekbag.net/uploads/1/3/0/5/130551206/jilegiroxev_soxekefuwotizi_fuxug.pdfIn PDF document text
    • http://respondhd.com/uploads/1/3/0/4/130476101/0b8e80.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000715c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715C 7556 bytes
SHA-256: ae1e377762dd9fd114a588512e85d3b8dad727309d89ed0adb8951bd788d2b1a

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