Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56208375e0991dd…

MALICIOUS

PDF

45.0 KB Created: 2020-04-03 04:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 794192451e6198c60684cf6dcc2f5032 SHA-1: a9c16d87c8f46c84803bd98feb3fe96508cd9570 SHA-256: e56208375e0991dde572c61f1a40087ae8789d52ca1025d46ee7624956f3a8cd
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The document body contains garbled text but also includes a URL that appears to be a lure. No scripts were extracted from this sample, limiting the ability to determine further payload delivery or execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://chasecrosby.com/uploads/1/3/0/2/130271244/130271244.html#pentax+optio+wg-2+price PDF link annotation
    • http://telcap.org/uploads/1/3/0/7/130775260/7917b1942091d.pdfIn PDF document text
    • http://zorgdoel.com/uploads/1/3/0/2/130289294/3924204.pdfIn PDF document text
    • http://nacta2018conference.com/uploads/1/3/1/1/131164136/widibowifo.pdfIn PDF document text
    • http://stevecolby.org/uploads/1/3/0/5/130588833/luvujegipidanex-mivunej-jesomenital.pdfIn PDF document text
    • http://mirrorsireland.com/uploads/1/3/0/6/130639678/jexazojarij.pdfIn PDF document text
    • http://stteresaofavilacatholiccommunity.org/uploads/1/3/0/7/130739991/rivajibijokezukoj.pdfIn PDF document text
    • http://ggfgreenway.com/uploads/1/3/0/2/130270832/6337920.pdfIn PDF document text
    • http://erel.info/uploads/1/3/0/7/130739012/2591959.pdfIn PDF document text
    • http://teachermistac.com/uploads/1/3/0/7/130738780/tuduripose.pdfIn PDF document text
    • http://adtech-supply.com/uploads/1/3/1/4/131407179/xafuwowawufi.pdfIn PDF document text
    • http://celtom.com/uploads/1/3/0/2/130289392/vasanologogajapi.pdfIn PDF document text
    • http://girlsofsurf.com/uploads/1/3/0/7/130738562/vaferita.pdfIn PDF document text
    • http://ammobrassconnection.com/uploads/1/3/0/2/130287988/2435171.pdfIn PDF document text
    • http://a-lutz.com/uploads/1/3/0/4/130483397/6811653.pdfIn PDF document text
    • http://internaddict.com/uploads/1/3/0/9/130969437/jeraj.pdfIn PDF document text
    • http://lloydvalleyconstruction.com/uploads/1/3/0/2/130292098/radetekesowomewuj.pdfIn PDF document text
    • http://winelines.net/uploads/1/3/0/4/130436285/dokimebalitipaxisa.pdfIn PDF document text
    • http://get-sent.com/uploads/1/3/0/6/130604215/fipedoj-loxisikinomig-wewakatogebi-lolakanula.pdfIn PDF document text
    • http://wpanc.org/uploads/1/3/0/7/130739459/setuden-kenimojutisa-nagotomow-meros.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 1

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_off0000882d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x882D 7900 bytes
SHA-256: 42758dc05a7d272c39dad1f6bced6d4b1a40d456c82f6cf3ce3747c8df3bd5a0

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