Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52b78a4a2264271…

MALICIOUS

PDF

35.7 KB Created: 2020-06-22 13:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: d0d2e179dbe429d1b939aa9823944ee4 SHA-1: 0a1f10361640d5a2ff366460b12fb1178fcb5834 SHA-256: a52b78a4a226427126bae9030bbca241d93e8b5c7a6ceed135f6723412d03ad3
96 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external websites, many of which appear to be part of a link farm designed for SEO manipulation. The document body mentions 'Online dwg to pdf conversion' and includes a primary URL that also relates to this theme, suggesting a lure to a malicious website. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://ncahe.com/uploads/1/3/1/4/131410597/131410597.html#online+dwg+to+pdf+conversion PDF link annotation
    • http://grheatingandcooling.net/uploads/1/3/1/6/131606275/jogaxul.pdfIn PDF document text
    • http://archi-graphics.com/uploads/1/3/0/4/130490461/texudoluja_wulibaxuj.pdfIn PDF document text
    • http://mx.shajaceramics.com/uploads/1/3/0/9/130969614/xaxenusopu.pdfIn PDF document text
    • http://sophistable.com/uploads/1/3/1/3/131383646/lifozasaj.pdfIn PDF document text
    • http://eastwestmassageandyoga.com/uploads/1/3/0/2/130272278/lixavofen_mofelaxo.pdfIn PDF document text
    • http://howdysugah.com/uploads/1/3/0/4/130483428/0669afbdf6e2132.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

Related samples 7

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4989 5080 bytes
SHA-256: 979d2565ff6ca1a1411f08ec4f1897eb0b5782b338dba065ea3fead0886225d5
font_01_sfnt_off00005b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0A 14652 bytes
SHA-256: 73528842beff473108ff23d26a732f7297aa8029c31ed4bb105090142b0fa408

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