Malicious PDF — malware analysis report

Static analysis result for SHA-256 930e0562731b469f…

MALICIOUS

PDF

36.5 KB Created: 2020-05-16 12:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: dbe461376a92a7397f1afda66870310a SHA-1: 84715ded1ea0573822e160136d3555773567c07c SHA-256: 930e0562731b469fac0d2e9c4100df73c3ded6c1b3579533b67f23efa74fe98a
136 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified as a PDF link farm. The ML classifier strongly indicates maliciousness. The document body contains garbled text and what appears to be metadata, but the primary malicious activity is the distribution of numerous URLs, likely to host spam content or redirect to malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://yes4evr.com/uploads/1/3/0/6/130604061/130604061.html#usana+celavive+sheet+mask PDF link annotation
    • http://ihsalumniassociation.com/uploads/1/3/0/8/130814416/saruxarozedemop_gazebujokeguliw_wokefogifus_negopuxu.pdfIn PDF document text
    • http://dainteasanddoilies.com/uploads/1/3/0/5/130590291/6326b619.pdfIn PDF document text
    • http://sewloving.com/uploads/1/3/0/6/130620384/xuwowozebimazi.pdfIn PDF document text
    • http://mobilecarpetandupholsterycleaning.com/uploads/1/3/0/6/130639865/6724015.pdfIn PDF document text
    • http://adamseve.net/uploads/1/3/0/4/130436159/f9cbc9c1ed24.pdfIn PDF document text
    • http://ontariotreeservices.ca/uploads/1/3/0/4/130491008/tuvavek.pdfIn PDF document text
    • http://seethroughcleaning.com/uploads/1/3/0/3/130323748/pufobewugipow_wolovinoxuvisi.pdfIn PDF document text
    • http://cemento-stampato.org/uploads/1/3/0/4/130483629/9213504.pdfIn PDF document text
    • http://northshoreresidentialma.com/uploads/1/3/1/4/131437354/favonariw.pdfIn PDF document text
    • http://piabhatia.com/uploads/1/3/0/3/130313700/ranosulapiwi.pdfIn PDF document text
    • http://weareknown.org/uploads/1/3/0/6/130604148/lofumobumip.pdfIn PDF document text
    • http://rachelroccophotography.com/uploads/1/3/0/5/130551218/b76f6be1d6d.pdfIn PDF document text
    • http://weymannopalenica.pl/uploads/1/3/0/5/130550968/nekenese.pdfIn PDF document text
    • http://theelfbox.com/uploads/1/3/0/6/130604393/04cb6c4c777fc4.pdfIn PDF document text
    • http://autorope.com/uploads/1/3/0/3/130313555/7710635.pdfIn PDF document text
    • http://purplegirlclothing.com/uploads/1/3/0/3/130323124/ropegag.pdfIn PDF document text
    • http://vrmp-viprequiredmeetupprevention2010.org/uploads/1/3/0/6/130620874/4576388.pdfIn PDF document text
    • http://videomickey.com/uploads/1/3/0/9/130969488/085ad963.pdfIn PDF document text
    • http://amriky.net/uploads/1/3/0/7/130740256/f885a1513711933.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 3

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_off0000635a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635A 10276 bytes
SHA-256: 07fc072f91999574367a5f8ed37b2da62fa5cfb9497a850b75d6457504779170

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