Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64c5c32c183d10a…

MALICIOUS

PDF

48.9 KB Created: 2020-06-14 20:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 79241fd62d9c433712b6cd69f5361b4d SHA-1: 0f0c16a58b5b971a9f63361c6909b28226f95b0b SHA-256: d64c5c32c183d10a7c15d823ea8ccffd58a22f787db76d23663bb45b9adfc136
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to SEO-optimized PDF files hosted on various domains. One of the embedded URIs, 'http://helgajoseps.com/uploads/1/3/0/4/130490117/130490117.html#hospital+maintenance+department+manual', suggests a lure to trick users into visiting a malicious website. The document body, though heavily obfuscated, contains text related to a 'Hospital maintenance department manual' and metadata indicating it was generated by wkhtmltopdf.

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://helgajoseps.com/uploads/1/3/0/4/130490117/130490117.html#hospital+maintenance+department+manual PDF link annotation
    • http://hostmaster.fotografiedimitridewitte.be/uploads/1/3/0/4/130489149/1c6395.pdfIn PDF document text
    • http://3cl.undesirable.us/uploads/1/3/1/6/131636824/biziz-surawan-fatumazalerow-kisusufulegesev.pdfIn PDF document text
    • http://kylepucciamusic.com/uploads/1/3/0/4/130435843/nuzudupunaperijanut.pdfIn PDF document text
    • http://hostmaster.rivelino.nl/uploads/1/3/0/2/130287737/1491179.pdfIn PDF document text
    • http://turnpikeone.com/uploads/1/3/2/3/132303035/warivagon-zotisoboto.pdfIn PDF document text
    • http://brooklandsalesinc.com/uploads/1/3/0/7/130775897/bamanodore.pdfIn PDF document text
    • http://admin.magicmudceramics.com/uploads/1/3/0/3/130379141/4807987.pdfIn PDF document text
    • http://tinakuhnleadership.com/uploads/1/3/0/9/130969831/ce05bb334c5.pdfIn PDF document text
    • http://mlhconsultancy.com/uploads/1/3/0/5/130542717/925879.pdfIn PDF document text
    • http://iclipse.org/uploads/1/3/0/2/130291585/2646593.pdfIn PDF document text
    • http://corinneweiss.com/uploads/1/3/0/7/130776272/5883541.pdfIn PDF document text
    • http://teachingachildtoread.com/uploads/1/3/1/0/131070314/a6ec2a1bf76.pdfIn PDF document text
    • http://craigandfred.com/uploads/1/3/0/8/130874012/3150039.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kewewigo.files.wordpress.com/2020/06/wuwavigakelagubotiritis.pdfIn PDF document text
    • https://lonovusuko.files.wordpress.com/2020/06/44731606036.pdfIn PDF document text
    • https://pitimonuzoxa.files.wordpress.com/2020/06/zodowutorixenedesotin.pdfIn PDF document text
    • https://sudomabu.files.wordpress.com/2020/06/60221283749.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

Related samples 8

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_off00009349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9349 10712 bytes
SHA-256: f3aed58850cfa4d83404a4d4e9e9635bd288bcc0c346e1b9350348b9149048ce

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